Ancient Spirits Of Evil

The following is a list of characters that appear in the American animated series '' ThunderCats'', its 2011 reboot, ''ThunderCats Roar'', and its related media.

Original ThunderCats

Jaga

Jaga (voiced by Earl Hammond in the original series, Corey Burton in the 2011 series, Larry Kenney in the 2020 series) is also known as "Jaga the Wise" and is based on the jaguar. This elder warrior was once regarded as the mightiest and greatest of all Thundercats by Lion-O himself. In his youth, Jaga was the Lord of the Thundercats, and rescued a young Hachiman from being trapped in the Jade Dragon (which later became a part of the Treasure of Thundera). An adviser and protector of the Lord's family, Jaga wielded the "Sword of Omens" and was a formidable fighter in combat. After Claudus was blinded, Jaga became the main guardian of the Eye of Thundera, the Sword of Omens, and the Treasure of Thundera. It was Jaga who gathered the nobles of the Thundercats to escort Lion-O and the Eye of Thundera to safety, but did not survive the trip to Third Earth as he volunteered to pilot the damaged ship while the others slept. Because of this, Jaga died of old age. However, Jaga does reappear on Third Earth as a ghost (seen only by Lion-O at first) to guide him in his lessons and adventures. At times, he appears before the other Thundercats as well such as when facing down Grune the Destroyer's ghost and when the Thundercats need to rescue their fellow Thunderians. Jaga's physical body does reappear at one point during the original series in the episode "The Astral Prison" where he was trapped in another dimension, prompting Lion-O to travel there to rescue him from being held captive by an evil inhabitant of said dimension. His fate as a physical living entity after this was never revealed, but his spirit form continued to appear throughout the series.

In the 2011 series, Jaga serves as head of Thundera's cleric warriors, possessing a knowledge of ancient secrets, superhuman speed, projecting lightning from his staff. In his prime, he used the "Sword of Omens" in an epic duel against Ratilla. At the start of the series, Jaga sacrifices himself to ensure Lion-O and his group escape. This resulted with him being tortured into revealing the location of the "Book of Omens" to Mumm-Ra, though doing his best to resist the villain's magic when sealed within a lantern, eventually his free will wavers along with his physical form. Though Jaga destroys the lantern that was keeping his soul intact to save Lion-O from Mumm-Ra, his soul took residence within the Book of Omens and becomes Lion-O's guide. In the 2-part "The Trials of Lion-O" Pt. 1, Lion-O encounters Jaga in the entrance to the Spirit World. Jaga tells Lion-O of the challenges he must undergo to gain a second chance in life. But when he failed the final test, Jaga allows Lion-O to return to the living long enough to save the other ThunderCats though it would exile Lion-O's soul to Limbo by sunrise. However, once saving his friends, Lion-O learns from Jaga that it was actually a test like the other challenges and allows Lion-O to remain among the living. Jaga character was described as being based on "Wisdom".

Lion-O

Lion-O (voiced by Larry Kenney in the original series, Will Friedle and Tara Strong (young) in the 2011 series , Max Mittelman in the 2020 series) is the leader and the hereditary "Lord of the Thundercats". Lion-O, based on the lion, wields the legendary Sword of Omens, which is able to fire bolts of energy and allows Lion-O to see across great distances with its power of "Sight Beyond Sight", the sword was created from the same star as the sword of plundar, the eye of thundera is the eye which belonged to a beast who was as gigantic as the mountain. He held immense power and was imprisoned in the gem forged by the ancestors of Jaga, who sacrificed themselves to save the Thunderians from his wrath, as well as the Claw Shield, a gauntlet that launches grappling lines from its claws. A mere child of twelve years old at the time of Thundera's destruction, Lion-O aged to adulthood during the trip to Third Earth when his suspension capsule failed to prevent him from aging too much. Although cunning and skillful, he is truly a child in a man's body, and throughout the series, must learn what it takes to become a true leader and gain true maturity.

In the latter half of the show's first season, Lion-O has to put all that he has learned to use in the "Anointment Trials", which consist of contests of strength, speed, cunning, and intelligence (this last is referred to as "mind-power" in the story arc) against each of the other Thundercats. (Complicating matters for Lion-O is the fact that he is required to be unarmed for the contests; moreover, the other Thundercats are not permitted to assist him. The Mutants attempt, but ultimately without success, to take advantage of this last in an effort to leave the Thundercats leaderless.) Ultimately triumphing over Mumm-Ra in a final battle ("The Trial Of Evil") in the heart of the villain's pyramid in which he discovers that Mumm-Ra, like any Egyptian mummy, is dependent upon his sarcophagus, Lion-O is crowned the true Lord of the Thundercats in a grand inaugural ceremony attended by nearly every inhabitant of Third Earth.

In the 2011 version, Lion-O is a teenager instead of being a boy inside an adult body. Lion-O can also be a bit of a hothead but is by far the most patient and understanding cat next to Cheetara. He is the only one at the beginning who believes that technology and Mumm-Ra exist even though the technology is sold across Third Earth. Lion-O believes that the other races of Third Earth should be treated equally as seen when Lion-O was defending two persecuted Lizards from some Thunderians until Claudus broke up the fight. After Claudus was killed by Mumm-Ra, Lion-O becomes the new Lord of the Thundercats. His catchphrase is ''"Whiskers!"'' whenever he finds himself in a bad situation. In "Legacy", it is revealed that Lion-O had an ancestor named Leo who played a part in the defeat of Mumm-Ra. Lion-O's weapons are the Sword of Omens and the Claw Shield. It is shown that Lion-O had feelings for Cheetara until in "Between Brothers" when she confessed her feelings for Tygra. In "Native Son", it is shown that Lion-O had an unnamed mother who died giving birth to him. In ''Recipe for Disaster'' it is shown that Lion-O had attempted to work through his relationship issues with Cheetara by pursuing Pumyra, trying multiple times to court her, all of which ended in disaster. However, after saving her from Mumm-Ra yet again she gives him a kiss on the cheek in thanks. However, in "What Lies Above Part 2", the feeling was revealed to be an act as she reveals her loyalty and love to Mumm-Ra and only toyed with Lion-O's emotions to further her advantage. Lion-O character was described as being based on Courage.

In ''ThunderCats Roar'', Lion-O is depicted as being child-like with his antics annoying some of the ThunderCats. The episode "Claudus" revealed that Lion-S is Lion-O's long-lost sister.

Lion-O is renamed ''León-O'' in the Spanish version, ''Leo'' in the German version, ''Starlion'' in the French version, and ''Lion'' in the Brazilian version.

Originally Lion-O was to be named Lion-L in the English language version.

Panthro

Panthro (voiced by Earle Hyman in the original series, Kevin Michael Richardson in the 2011 series, Chris Jai Alex in the 2020 series) is the next noble and greatest warrior after Jaga, and based on the panther. Even though a warrior in all forms of ThunderCats martial arts fighting, Panthro has a brilliant mind, which he uses as the chief mechanic/engineer and pilot for the ThunderCats. He is also physically the strongest and is a cunning warrior in combat, relying as much on martial arts as on physical strength. With Tygra's help, he builds all of the vehicles the ThunderCats use on Third Earth—including the ThunderTank, the Feliner and the ThunderClaw, ThunderStrike, and HoverCat. Panthro is a complex ThunderCat. On the one hand, he has great passion, love of family, and life. With an infectious laugh, accompanied by a good sense of humor. On the other hand, he is a stone-cold warrior. He lives by the ThunderCats warrior code. Pride, excellence, and loyalty are a hallmark of what makes Panthro tick. Because of his passion, he is known to lose his patience with other ThunderCats. On the field of battle, however, he is cool, calm and collected. Because of this, Panthro has gained respect both from friends and enemies alike. They respect the king but fear the panther. In combat, he uses a pair of ''nunchaku'' with open-away cat-paws, which house several chemical spray-compounds, and objects such as ball bearings, that he can use against foes. The spikes on his chest bands can be used as projectile weapons or as rappelling lines also. Panthro does have a fear of bats.

In the 2011 series, Panthro is one of Claudus' more loyal soldiers who was sent with his friend Grune to find the Book of Omens. Their attempted search resulted with Mumm-Ra's release and Panthro being betrayed by Grune, and ruing a struggle, fell down an abyss and was believed killed. However, Panthro survived the fall and constructed the ThunderTank, which he later used to save Lion-O's group from Slythe's platoon. Though he questioned Lion-O's ability to lead, Panthro eventually accepted him as the new king. Unlike the rest of the ThunderCats, he never learned how to swim. In "Between Brothers," Panthro duels with Grune when he and Slithe attack the Elephants' village against Mumm-Ra's orders. Panthro loses his arms while trapping Grune in the astral plane. He was later outfitted with mechanical arms built by the Berbils which can also elongate themselves. In "The Pit," it was revealed that he was an old friend of Dobo back when they were slaves in a gladiator arena called The Pit which was located in a city that is inhabited by Dogs. Panthro later escaped the Pit when it turned out that the match the next day would be a deathmatch. This caused Dobo to feel bitter towards Panthro until Panthro revealed the deathmatch would pit him and Dobo against each other. In "What Lies Above" it is revealed Panthro is afraid of heights, which he finds out during the Feliner's first flight.

Tygra

Tygra (voiced by Peter Newman in the original series, Matthew Mercer in the 2011 series, Patrick Seitz in the 2020 series) is a staunch, level-headed warrior based on the tiger. Tygra is known as the ThunderCat architect and scientist. He is the one Lion-O often turns to as second-in-command and for counsel. He is responsible for the design of all of the ThunderCat structures on Third Earth—the Cat's Lair and the Tower of Omens. He is also gifted with "mind-power"—the ability to create lifelike illusions in other people's minds; he used this for Lion-O's Anointment Trial, but it puts a great strain on him. He uses a whip-like bolas in combat, with which he can render himself invisible to the naked eye. In the episode "All That Glitters", Lion-O instructs Tygra "If I do not return, you will be the new Lord of the ThunderCats". This verifies that indeed Tygra is the second-in-command. Tygra's weakness is that he is not able to swim when not invisible. Also, Tygra has shown to be easily influenced by external stimuli more than any other ThunderCat ("The Garden of Delights", "Turgamar the Tuska" and "Crystal Canyon"); he also claimed to be shy when being a kid. Patient, analytic and calm, Tygra is the quietest ThunderCat, and usually considers every part of the problem before making a decision.

Where creators Ted Wolf and Leonard Starr described Panthro's character as being based on "strength" and Cheetara's character as being based on "speed", Tygra's character was described as being based on "integrity."

In the 2011 series, the character is the adopted older brother of Lion-O. A flirtatious ladies man, Tygra possesses xenophobia, a jealous streak, and superiority to Lion-O in every way, all of which often serve to cause friction between himself and Lion-O. As he would learn later in the season, Tygra is of the Tiger Clan who were forced, by the spiteful other cat clans, to live in the frozen mountains far from Thundera due to their steadfast continued loyalty to Mumm-Ra even after the latter's entrapment. Sent to Thundera as a baby by his biological father Javan, Tygra was raised by Claudus and his wife with the latter loving Tygra dearly prior to her death while giving birth to Lion-O. Losing both the right to succeed his foster father and the only mother he knew, Tygra grew to hate Lion-O and questioning the latter's decisions after he became the new Lord of the Thundercats. Furthermore, Tygra fell in love with Cheetara when they first met as children in the past, although he believed she never returned his feelings for her. Her apparent friendship with Lion-O gave him another reason to bear a grudge on his brother. Tygra and Cheetara eventually become a couple after Cheetara confesses her love for Tygra. Soon after, Tygra meets his birth father and inherits his whip. In "What Lies Above" he is explained to be a natural pilot able to fly any craft without any training at all due to his ancestors serving as pilots under Mumm-Ra.

In ''ThunderCats Roar'', Tygra is depicted as a neat freak.

Tygra is renamed Tigro in the Spanish, German and French versions.

Cheetara

Cheetara (voiced by Lynne Lipton in the original series, Emmanuelle Chriqui and Grey DeLisle (young) in the 2011 series, Erica Lindbeck in the 2020 series) is a female warrior, based on the cheetah. She is the only adult female ThunderCat until the later appearance of Pumyra. She is as lovely as she is brave and caring. Often a voice of reason, she is also the bearer of a budding "sixth sense," detecting when something is unsafe or if evil is near. This precognitive sense, which Cheetara regards as a curse for the most part, also allows her to perceive visions—whether involuntary or by forcing herself—but can leave her very weak; she may require days to regain her strength. It was this ability that enabled Lion-O to learn the fates of Lynx-O, Pumyra, and Bengali the day when Thundera exploded. She has incredible speed, once clocked at 120 m.p.h. on a morning jog. She can maintain this speed only for brief periods, but with it, she is very fast in combat. Her weapon of choice is a baton that expands into a '' bō'' that can grow or shrink to variable lengths. When not in use, it is attached to her left armband. The season one episode "Sixth Sense" briefly hinted at the idea of romantic attraction between Cheetara and Lion-O, however, the subject was never revisited again in the series.

In the Wildstorm/DC comic book series it is revealed that, while most of the ThunderCats detest and avoid water, Cheetara loves it and is by far the best swimmer among them. In the Wildstorm/DC miniseries ''ThunderCats: The Return'', Cheetara is revealed to have been made a slave of the mutants during Lion-O's time training inside the Book of Omens, and it is hinted that she was sexually abused by them, though it is never outright confirmed. The comic again references the ideas of a possible romance between Cheetara and Lion-O— seemingly expanding on the hints from the episode "Sixth Sense", indicating that feelings may have developed post-cartoon and pre-comics between the two— but indicates that Cheetara had begun to resent Lion-O after the defeat of the ThunderCats by Mumm-Ra and the Mutants and her ensuing enslavement for not coming to her rescue sooner, and her feelings had shifted towards Panthro in the intervening years, who is hinted to reciprocate her feelings when he and Lion-O manage to rescue her from the Mutants.

In the 2011 series, Cheetara is one of the last remaining cleric warriors. When she originally tried to join the Order of Clerics as a child, she was initially turned down by Jaga, because even though she had the speed possessed by clerics, she lacked the patience. Despite being turned down, Cheetara decided to show Jaga she had the patience needed to become a cleric and began to wait in front of the Order's doors. While waiting, she was given a flower by Tygra, which helped Cheetara sustain herself for days, until Jaga finally allowed her to join the clerics. In the aftermath of Thundera's downfall, Cheetara's possibly the sole surviving member of the Order, other than Jaga, who lives on in spirit form. Cheetara initially served as an encourager to Lion-O, since she never shunned him for his interest in technology and initially seems to support his kindness to other races. During the first half of the first season, both Tygra and Lion-O harbor romantic feelings for her and competed for her love. Originally many believed Cheetara held feelings for Lion-O and would choose him, but in the end, it's revealed she has always been in love with Tygra since their childhood when he had shown her kindness and support during the days she desired to become a cleric. Cheetara and Tygra become a couple shortly thereafter and Cheetara later abandons her duties as a Cleric in "New Alliances" to save Tygra's life.

In ''ThunderCats Roar'', Cheetara has an athlete personality.

Cheetara is renamed ''Chitara'' in the Spanish version, ''Geparda'' in the German version, ''Félibelle'' in the French version.

In the WildStorm/DC comic mini-series, Tygra eventually marries Cheetara and the two raise a pair of twin cubs.

WilyKit and WilyKat

WilyKit (voiced by Lynne Lipton in original series, Madeleine Hall in the 2011 series, Erica Lindbeck in the 2020 series) and WilyKat (voiced by Peter Newman in original series, Eamon Pirruccello in the 2011 series, Max Mittelman in the 2020 series) are twin siblings, Kat being the older brother and Kit as the younger sister where both of them are based on the wildcat; they are jointly referred to as "ThunderKittens" by the other characters, although technically they are older than Lion-O. In the original series, Kat appears to be the equivalent to a human that is twelve years of age. They are the mischief-makers, and often have their own lessons to learn alongside Lion-O while they live on Third Earth, where they frequently use tricks and traps to combat evil. Kit is the more adventurous, while the older Kat usually errs on the side of caution. Kit also appears to be the more agile, and at times, she employs a rolling-attack against the enemy. Their agility is often displayed when they ride their "space boards"—specially designed flying devices shaped like Earth surfboards that can carry them over long distances. Each uses special capsules, balls and other gimmick weapons carried in pouches and on their belts. They sometimes use slingshots to fire these at the Mutants or other foes. They also carry trick lariats, with which they can either tangle and ensnare foes, or use to pull themselves out of danger. In the first episode, they appeared to be slightly older than Lion-O, but when they went into suspended animation, they did not age as far in their suspension capsules as Lion-O did in his.

In the 2011 version, they are younger in age and were originally from a low-class family in the countryside living with their mother, their father, and their two siblings. When the two lost their father to a tornado, resulting in the family becoming more down-trodden, the twins resolve to run away from home to find the lost city of El Dara and become rich. However, upon arriving to Thundera, they were forced to become street urchins and lock-picking pickpockets in order to survive the slums with their aspirations the only thing keeping them going. When the Lizards attack Thundera, the two manage to escape during the chaos before eventually teaming up with the ThunderCats on their journey. In this version, WilyKit and WilyKat have tails, which none of the main adult ThunderCats except Panthro possess (how Panthro lost his is never shown nor explained), and visible external ears. Like in the original series, WilyKat possesses gimmick weapons with his usual weapon being a grappling hook called a Flick. WilyKit also possesses a special musical instrument called a Flupe that she uses to play a soothing melody that their mother used to hum to the siblings, able to put anyone in a hypnotic trance. During her time with the Elephants, learning to use her flute to shatter boulders when in tune with the Elephant's trumpets. Over the course of the first half in season one, Wilykit gained a spiritual outlook on life as she and her brother become more involved in their adult companions' fight. This new outlook allowed the youth to assume Cheetara's abandoned role of Cleric, encouraging Lion-O when he needs it the most. In the second half, the twins acquire hoverboards from the Berbils and later the Forever Bag, a magic bag previous thieves possessed that has an infinite storage space, activated by the magic word "rankinbass" (a reference to Rankin/Bass Productions, which produced the original series).

In ''ThunderCats Roar'', Wilykit has a tomboy personality, while Wilykat is the more mature half of the duo.

WilyKit and WilyKat are renamed ''Felina y Felino'' in the Spanish version (except in the 2011 version, where they retain their original names), and ''MiniKit und MiniKat'' in the German version.

ThunderCats who appeared later in the series

At the start of the series' second season, it was revealed to Lion-O (after having a recurring dream about the final moments of the destruction of Thundera) that there are three more Thunderians living on Third Earth whom Jaga was unable to rescue. They survived the cataclysm when rescued by a Ro-Bear Berbil scout ship piloted by two Berbils. The ship was damaged in the final explosion of the planet and made it to Third Earth landing on an unknown island somewhere in the northern sea as the ship didn't have enough fuel to get to the Berbil Village. This was revealed to Lion-O when Cheetara focuses her powers into tapping into this knowledge.

After Mumm-Ra tries to capture them to use as bait to destroy the ThunderCats at Firerock Mountain (which is where a lot of Thundrainium is located), these three Thunderians are rescued and brought back to the Cat's Lair, where Lion-O anoints them as new ThunderCats. They initially come to live in Cat's Lair until after the arrival of the Lunataks, at which time they are stationed at the Tower of Omens.

Bengali

Bengali (voiced by Peter Newman) is one of the two younger Thundereans among the trio, named after the bengal tiger and resembling the white variant. This warrior is a skilled blacksmith like his father before him and it proves valuable after the Sword of Omens is once again broken. Fast and agile like Tygra, Bengali is called "brother" by him, but it is unclear if they share a true familial bond or if the greeting is merely meant as a term of endearment (given that the new ThunderCats repeatedly call the originals "Nobles" while referring to themselves as "mere Thunderians," it seems unlikely that there is any family relationship between the two). Another possibility is that because they are both tigers, the Ben-Gal clan may be cousins to the Tygra clan, even though one is considered nobility while the other is not. In combat, Bengali wields a weapon called the Hammer of Thundera (which he also uses when doing blacksmith-related work). It can shoot energy blasts, and carries smoke pellets in its handle, to allow him to cause confusion and provide cover for withdrawal from a fight.

He is the only Thundercat who does not appear in the 2011 series.

Lynx-O

Lynx-O (voiced by Doug Preis in the original series, Kevin Michael Richardson in the 2011 version) is the oldest of the trio who is based on the lynx. Lynx-O was spared the sight of the destruction of their homeworld by a cruel twist of fate: a blast of intense heat and fire blinded him moments before he and his two younger companions were rescued, leaving his eyes all orange denoting blindness. Because of this injury, Lynx-O has had to adapt to survive on Third Earth and has done so by honing his other senses to super-human levels. His sense of touch, smell, taste and hearing are far above those of the other ThunderCats, and this affords him a type of "sixth sense," though it is not like the one Cheetara possesses. Though blind, Lynx-O is still a formidable fighter. His sense of touch allows him to find pressure points on a foe's body to knock them off balance or stun them. He can also feel vibrations, which allow him to evade attacks and capture, and can use a Sonic Reflector as a weapon in combat. His greatest skill comes in utilizing a special "braille board"—a device that allows him to translate information coming from sensor systems inside the Tower of Omens, enabling him to see into the gloom of Dark Side. This same device also allows him to pilot the ThunderStrike aircraft through the Valley of Mists when the ThunderCats need to find a way through to Dark Side.

In the 2011 series, Lynx-O is a general under Claudus. He first made a cameo as one of Thundera's lookout sentries. It is unknown as to whether or not he survived Thundera's destruction. If there was a season two, it would have depicted Lynx-O's history with Slithe and show how the Lizards sided with Mumm-Ra.

Pumyra

Pumyra (voiced by Gerrianne Raphael in the original series, Pamela Adlon in the 2011 series) is another female Thunderian along with Cheetara and WilyKit. This young woman who is based on the puma is a talented healer and medic. She uses her knowledge of Thunderian medicine, combined with the wide range of medical supplies to be found on Third Earth, to help heal and cure her fellow ThunderCats. Her compassionate nature lends to offering an alternative perspective, solving problems or conflict without fighting by using compromise and understanding. Possibly the most agile ThunderCat next to the ThunderKittens, Pumyra employs an incredible leaping ability—often able to vault higher than even great jumpers like Tygra or the ThunderKittens. She was also shown to be able to move in short bursts of super-speed (while moving fast she resembled a flash of lightning darting from place to place). In combat, she uses special whipcord, which resembles a "cat's tail," that can launch special pellets and spheres like an ancient sling. Pumyra's role gradually decreased after her role in the first two movies. The only episode to focus on Pumyra was "Mumm-Rana's Belt" where she helps to regain Mumm-Rana's belt after it was stolen by Luna. In "The Return to Thundera Part IV," she and Tygra stay behind on Third Earth in order to continue protecting the planet from danger.

In the 2011 series, Pumyra is portrayed as bitter, spiteful, passionate, independent, agile, sly, and manipulative. She takes over Tygra's role in questioning Lion-O's decisions. Unlike Tygra, Pumyra easily manipulates Lion-O to side with her. Pumyra originally fought against the lizards during the fall of Thundera before being wounded and left to die under the rubble as nobody could hear her. In her final moments, she witnessed Lion-O, Tygra, Cheetara, WilyKit, WilyKat, and Snarf fleeing the city. Pumyra died hateful and resentful towards Lion-O and company for abandoning Thundera while they failed to hear her pleas for help. Sensing her strong hatred, Mumm-Ra resurrected Pumyra to give her a second chance in life, serving him as his spy, placing her among the captive Thunderian slaves to be sold to Dobo. From there, meeting Lion-O and managing to keep her need for revenge in check when she is unable to finish off Lion-O, Pumyra earns his trust and love while serving as a beacon for Mumm-Ra to regain the Sword of Plun-Darr and track the Thundercats' movement. Lion-O viewed Pumyra as a possible love interest and makes several attempts to impress her which usually result in her being injured, captured or humiliated. Although Pumyra often rejects Lion-O, on rare occasions she displays acts of affection to keep him obsessed with her. Cheetara is concerned with Lion-O's feelings for Pumyra and doesn't think she is right for Lion-O. It was during the siege of Avista that Pumyra reveals her true colors by giving the Tech Stone to Mumm-Ra, who she calls her true master and love. After taking a hit from Ro-Bear Bill and Dobo, Pumyra leaves with Mumm-Ra and promises to kill Lion-O the next time they meet. According to the creators if there had been a season two, Pumyra would've turned into a wicked insectoid due to her hunger for more power.

Thunderians on Thundera

Claudus

Claudus (voiced by Earl Hammond in the original series, Larry Kenney in the 2011 series, Andrew Morgado in the 2020 series) is the previous Lord of the ThunderCats and Lion-O's father who like his son is based on the lion. Claudus ruled Thundera before its destruction. He lost his sight during a war he fought against the mutants of Plun-Darr. In the episode "Return to Thundera," Lion-O is transported back in time to Thundera the day before it was destroyed. He later rescued his father from past versions of Slithe and Vultureman (who were attempting to recover plans for a War-Bot that had fallen into the hands of Claudus's spies). He then proceeded to give these plans to Lion-O, who used them in the present to destroy the mutants' War-Bot. Believed to have died on Thundera while assisting the royal flagship in taking off, he was later found to have been captured by the Shadowmaster. Through a sequence of nightmares, Lion-O eventually learns from Jaga of his father's imprisonment in the Shadow Realm and is able to rescue him. Claudus is currently with Jaga in the afterlife.

In the 2011 series, Claudus is a stern father to Lion-O and the adoptive father of Tygra. He had a wife who died giving birth to Lion-O. When Grune and Panthro had fought bravely to get promoted to general, Claudus told them that he has given the job to Lynx-O. He was the one who sent Panthro and Grune to find the Book of Omens. When Lion-O was fighting off some Thunderians who were beating up two imprisoned Lizards (where Lion-O was assisted by Tygra and Cheetara), Claudus arrived to break up the fight. He was convinced by Lion-O to let the Lizards go free and back to their homeland. When Thundera was being attacked by the Lizards, Claudus is murdered by Mumm-Ra (who had assumed Panthro's form). Lion-O, Cheetara, and Tygra later hold a funeral pyre for him after escaping with the Sword of Omens.

In the 2020 series, Claudus was shown to have survived the destruction of Thundera. In this show, Claudus is depicted as a jerk and a bad ruler as well as having Lion-S as his daughter.

Thunderians on New Thundera

When the planet of Thundera is reformed in Season Two of the series by Mumm-Ra in a plot to claim the Sword of Plun-Darr, the ThunderCats must work to stabilize the planet before it can tear itself apart again. It is here that they discover another ThunderCat and gain additional allies.

Jagara

Jagara (voiced by Gerrianne Raphael) is found deep within the core of New Thundera. This powerful, ancient Thundercat (like Jaga, based on the jaguar) is an immortal sorceress. Her duty is to guard the massive gyroscope that keeps the planet intact. She uses the powers of levitation, teleportation, and psychokinesis to perform her tasks and to defend the gyroscope from attackers. It is noted by Jaga (no relation) that she has been acting in this capacity for countless years.

Thunderian commoners

* Torr (voiced by Larry Kenney) – A young Thunderian commoner of indeterminate feline motive rescued by the ThunderCats along with other commoners from their ship drifting into deep space. Since then, Torr has been an ally of the ThunderCats where he has often helped the ThunderCats in various missions. In "Well of Doubt," Torr is shown to have a history with Baron Tass.
* Leah (voiced by Lynne Lipton) – A Thunderian little girl of indeterminate feline motive whose escape pod was intercepted by Mumm-Ra and landed in the Jungles of Darkness. Her doll was used by the Ancient Spirits of Evil to disguise the Mirror Wraith to infiltrate the Cat's Lair forcing her to keep it a secret. She was later freed from the influence of the Mirror Wraith by the ThunderCats.

Other Thunderians

The following Thunderians appeared in different media projects:

* Leo (voiced by Will Friedle in the first appearance, Jason Marsden in the second appearance) – Exclusive to the 2011 series, Leo was Lion-O's direct ancestor and Mumm-Ra's right hand. Leo originally believed in Mumm-Ra's ideals for order across the cosmos prior to witnessing the death of the Plun-Darr galaxy. Deciding to engineer a rebellion, Leo gathered the scrapes from what remained from the creation of the Sword of Plun-Darr to create the Sword of Omens to defeat Mumm-Ra. In the aftermath of the Black Pyramid's descent to Third Earth, the Stones of Power taken from Mumm-Ra were split amongst the major races of Third earth with Leo keeping the War Stone with the Cats as the Eye of Thundera.
* Panthera (voiced by Cree Summer) – Exclusive to the 2011 series, Panthera was a Thunderian based on a panther who was among the Thunderians that worked for Mumm-Ra. Being Leo's second-in-command and girlfriend, she tried to convince him to betray Mumm-Ra. It was only after the death of the Plun-Darr galaxy that Panthera convinces Leo in planning a mutiny against Mumm-Ra. Her fate after the Black Pyramid's descent to Third Earth is unknown (although, given that she and Leo were implied to be a couple, it is possible that she married him and is also Lion-O's ancestor).
* Javan (voiced by Robin Atkin Downes) – Exclusive to the 2011 series, Javan is a Thunderian based on the Javan tiger and is the biological father of Tygra. His ancestors were shunned by the other Thunderians as the Tiger Clan branch of the Thunderians were still loyal to Mumm-Ra. When his kin was inflicted with a plague, Javan chooses not to turn to Thundera for aid and instead invoke the power of the Ancient Spirits of Evil to save his people. But once learning their price for their survival is the death of his newborn son Tygra, Javan couldn't bring himself to sacrifice the infant to honor their pact and send him away. As a result, the Ancient Spirits bound the souls of the Tiger Clan to the living world as cursed shape-shifting shadow monsters that obey the Ancient Spirits of Evil's every command at nightfall. Many years later while he and Lion-O were in the mountains, Tygra came across his ancestral home and meets Javan, expressing discontent towards the father who abandoned him. It was only later that Lion-O learned the truth of the curse as Javan tells him not to tell Tygra and get him away from the village before the sun sets. However, upon learning that Caspin and some of his royal court are going to kill his son, Javan fends them off before the curse takes effect and he mindlessly attacks Tygra. However, Tygra's act of humility broke the curse so both Javan and his kin are able to pass on to the next life. Tygra then inherits his father's whip.
* Caspin (voiced by Jim Cummings) – Exclusive to the 2011 series, Caspin is a Thunderian based on the Caspian tiger. He is among the tiger-based Thunderians that live in the mountains and serves their leader Javan as his right-hand Cat on his royal court. When Lion-O and Tygra came across the Tiger Clan's cave, Caspin took them to meet Javan. During this time, Caspin saw an opportunity to end his people's curse as he and his conspirators decided to kill Tygra themselves. However, Javan comes to Tygra's aid and was forced to kill Caspin in self-defense stating that it didn't have to be this way. Before dying, Caspin told Javan that it had to be this way since it was Javan's fault that the entire Tiger Clan was cursed. But as the curse is broken and the Tiger Clan was revealed to have already died long ago, Caspin's spirit body faded away alongside the spirit bodies of the other Tiger Clan members.
* Lion-S (voiced by Kaitlyn Robrock) - Exclusive to ''ThunderCats Roar'', Lion-S is a Thunderian based on a lion. She came to Third Earth where she met Lion-O who found a kindred spirit in her due to the fact that they have good sword tricks and a talent for pranks like they did on Mumm-Ra and the Mutants. What Lion-O didn't know is that she is an escaped convict from the Gray Penal Planet who Mandora was after. While Lion-S managed to swipe the Sword of Omens, Lion-O revealed one other sword trick as he quoted "Sword of Omens, come to my hand." Lion-O allowed Lion-S to go which got the ThunderCats in trouble with Mandora for aiding and abetting an escaped convict. The episode "Claudus" reveals that Lion-S is Claudus' daughter making her Lion-O's sister.

The Snarfs

The Snarfs are a race of intelligent cat-like creatures that are plump, fuzzy and kind. Snarfs are native to Thundera, living in the Valley of Snarfs, and many of their numbers act as servants to Thunderean nobility, happily working as cooks, nursemaids, squires and so forth. When Thundera was destroyed, forty-nine Snarfs were able to commandeer a Mutant tanker and made their way to an uninhabited planet which they took as their own, dubbing it the "Planet of Snarfs". Later, when Mumm-Ra recreated Thundera, he captured the Snarfs and brought them back to their home planet, putting them to work searching for the Treasure of Thundera. Subsequently, liberated by the ThunderCats, the Snarfs returned to living happily on Thundera.

Snarfs are the only creatures in the Universe incapable of evil (except while possessed), although, in episode 105, Snarf becomes corrupt with the power to control the other ThunderCats. Quick and clever, a Snarf is a loyal friend, though their small size often makes them a target for Mutants or other evil creatures. The Snarfs have proved to be valuable allies to the ThunderCats in times of peril. Though their fighting skills are more than wanting, the Snarfs have an inherent invulnerability/resistance to many (but not all) forms of magic and mind-control. This ability has enabled the Snarfs to save the other ThunderCats on several occasions. Snarfs are known to end their sentences with the squeaking exclamation for which they are named—"snarf, snarf!"

Snarf

Snarf (voiced by Bob McFadden in the original series, Satomi Kōrogi in the 2011 series) is an elder Snarf, properly known by his name Osbert, which he hates. Snarf served as a nursemaid and protector for Lion-O when he was a boy. After Lion-O grew up, Snarf found that often Lion-O did not want to have him "mothering" or protecting him. Still, Snarf has remained loyal to Lion-O and the other ThunderCats. At times, he does come through in a pinch with an idea and takes action when it is needed. Despite his age, he does keep up with the others. Even though not a fighter by skill or nature, Snarf is very agile (he boasts he can outplay anyone at tail bail or kick-the-bucket). He also can communicate with other animals on Third Earth to enlist their help in his tasks, and once even tricked the Ancient Spirits of Evil into giving him a power-up to become a being called Snarf-Ra.

In the 2011 version, Snarf is more of a pet to Lion-O and does not speak English but can make animal sounds (though it seems Lion-O can still understand him). In later episodes, he goes "Snarf".

In ''ThunderCats Roar'', Snarf is depicted as a robot animal. The episode "Snarf's Day Off" reveals that Snarf can take the form of a normal house cat once a month to pay a visit to an old lady named Mrs. Gristildi. He accompanied Mrs. Gristildi to the craft fair where she competed with a disguised Mumm-Ra. When Snarf's true form was revealed by Mumm-Ra, Mrs. Gristildi sheds her disguise revealing her true form of Mumm-Rana who beats up Mumm-Ra. Now knowing each other's secrets, both of them use the photos of Mumm-Ra's beatings for their homemade calendar.

Snarfer

Snarfer (voiced by Bob McFadden) is a young and excitable Snarf who is Snarf's young nephew. He was thought lost when Thundera exploded but was one of the surviving Snarfs that made it to the Planet of Snarfs. Slightly more aggressive than his uncle, Snarfer is a keen mechanic and pilot in his own right, having been educated at "Snarf College" while majoring in Snarf-Studies (Snarf once said he was a "college boy"). He does tend to babble when over-excited, but at times he can be just as level-headed as Tygra. Though smaller than Snarf, he does not allow that to get in his way when he wants to help friends. It was through him that the ThunderCats learned, much to their surprise, that Snarf's real name was Osbert—and that he hated the name.

Snarf Oswald and Snarf Eggbert

Snarf Oswald (voiced by Earle Hyman) and Snarf Eggbert (voiced by Larry Kenney) are two of the Snarfs who survived the destruction of Thundera, this duo became the ThunderCats main Snarf "contacts" on New Thundera. Oswald was originally mentioned by Snarf during the first season, noting that he owed him "fifty thunder-dollars."

Natives of Third Earth

The Ro-Bear Berbils

The Robear Berbils are partly-furred robotic bears from the planet Ro-Bear. Because their homeworld is so tiny, they must form other colonies on distant worlds to survive. Small and harmless-looking, the Berbils are steadfast, hardy workers and skilled farmers, cooks, and craftsmen. It was thanks to them that Tygra was able to build Cat's Lair—and later the Tower of Omens—so quickly. Apparently, the Robear Berbils are cybernetic organisms, as they are able to eat and digest organic food. When they were first encountered, the ThunderCats protected the Berbil's candy fruit crops from the Trollogs and the Giantors.

In the 2011 series, the Berbils are shown to be more bear-like and have an ability to roll up into balls. The Berbils made themselves known to the ThunderCats when they helped to repair the Thunder Tank and give them food. Panthro was against their cute appearance first until it came to repairing Ro-Bear-Bill following an attack by the Conqueror (who had been abducting Berbils and selling them as slaves). The ThunderCats managed to help the Berbils drive away the Conqueror along with his Trollog and Giantor customers. The Berbils later help in constructing Panthro's new arms and upgrading the Thunder Tank. In "What Lies Above" Pt. 2, Wilykit and Wilykat were able to get the Berbils to help them fight Mumm-Ra and save Avista. After Avista was safely landed on the ground, the Berbils began working to get Avista operational again.

* Ro-Bear-Bill (voiced by Earl Hammond in the original series, Dee Bradley Baker in the 2011 series, Dana Snyder in the 2020 series) - A brown Ro-Bear Berbil and the co-leader of the Berbils. He is one of the first Ro-Bear Berbils to befriend the ThunderCats and often supply information about local places, people and phenomena on Third Earth. Through their fields and forests of fruit trees, they are also able to provide the Thundereans with new food stuffs. After the Mutants and the Lunataks were removed from Third Earth, Ro-Bear-Bill and Ro-Bear-Belle become members of the League of Third Earth.
* Ro-Bear-Belle - An orange Ro-Bear Berbil and co-leader of the Berbils. She is one of the first Ro-Bear Berbils to befriend the ThunderCats and often supply information about local places, people and phenomena on Third Earth. Through their fields and forests of fruit trees, they are also able to provide the Thundereans with new food stuffs. After the Mutants and the Lunataks were removed from Third Earth, Ro-Bear-Bill and Ro-Bear-Belle become members of the League of Third Earth.
* Ro-Bear-Bert - A blue Ro-Bear Berbil who is skilled at agriculture, is an expert cook, and doesn't talk much. He and Ro-Bear-Bob were the ones who saved Lynx-O, Bengali, and Pumyra from the destruction of Thundera by inviting them on their ship which Ro-Bear-Bert piloted. The ship was damaged upon evading the explosion of Thundera and landed on an island on Third Earth since it didn't have any more power to get back to the Berbil Village. The two Berbils alongside the other three ThunderCats ends up landing on an uninhabited island where they lived until they were caught by Hammerhand and his pirates. Ro-Bear-Bert and Ro-Bear-Bob were later rescued by the ThunderCats and assumed to have been reunited with the other Berbils.
* Ro-Bear-Bob - A yellow Ro-Bear Berbil. He and Ro-Bear-Bert were the ones who saved Lynx-O, Bengali, and Pumyra from the destruction of Thundera by inviting them on their ship. The ship was damaged upon evading the explosion of Thundera and landed on an island on Third Earth since it didn't have any more power to get back to the Berbil Village. The two Berbils alongside the other three ThunderCats ends up landing on an uninhabited island where they lived until they were caught by Hammerhand and his pirates. Ro-Bear-Bob and Ro-Bear-Bert were later rescued by the ThunderCats and assumed to have been reunited with the other Berbils.

Warrior Maidens

The Warrior Maidens are a race of barefoot Amazon women who live in the forests of what is called the Tree-Top Kingdom. They are fierce fighters and very territorial. At first distrustful of the ThunderCats (whom they view as aliens), the Warrior Maidens soon treat them as friends. Often, Nayda and Willa are the two who have the most contact with the ThunderCats. While some of the Warrior Maidens resemble Native Americans, other Warrior Maidens have different skin tones, whereas some of the Warrior Maidens have red hair.

* Willa and Nayda (both voiced by Lynne Lipton in the original series, Laila Berzins and Cindy Robinson in the 2020 series) – Sisters who are both members of the Warrior Maidens. Willa is their leader while the younger Nayda is a scout and second-in-command. Both are expert markswomen with bows and arrows and are very agile and fleet among the branches of their forest home. Often distrustful of outsiders, both become friends of the ThunderCats, and, by their example, the rest of their people treat them as allies. They often help the Thundereans by showing them paths around Third Earth and using special tricks (like a giant tree-top spider Bushy when it came to rescuing Tygra from Castle Plun-Darr) to aid them on their quests and missions. On one occasion, Willa is even able to use the Sword of Omens' "Sight Beyond Sight," which normally is possible only for Lion-O. After the Mutants and the Lunataks are removed from Third Earth, Willa and Nayda become members of the League of Third Earth. In the 2020 series, Willa mostly speaks in grunts with Nayda translating for her.

Wolos

The Wolos are small, furry people who have small villages all around the habitable places of Third Earth. The Wolos work as farmers, carpenters, and fishermen. The Wolos often use donkeys for their transportation. They are gentle folk who often turn to the ThunderCats for protection.

In the 2011 series, the Wolos (pronounced "Wallow" in the reboot) are shown to have rodent-like teeth.

* Ponzi (voiced by Jim Meskimen) – Exclusive to the 2011 series, Ponzi is a scam artist who travels from town to town to sell "miracle elixir" that he promises will solve all customers' problems. However, the elixir has unpredictable side effects that force him to leave town. However, meeting the ThunderCats, Ponzi learns his elixir has a neutralizing effect on Sycorax (a monster that Mumm-Ra resurrected as his vessel). He helps the Thundercats with gathering Caracara leaves to make a new batch of elixir and Lion-O with winning Pumyra's affection, though both attempts to help backfire with Ponzi's caterpillar Lucy eating all the Caracara leaves as Sycorax arrives. Upon metamorphosing into her butterfly-like adult stage, Lucy uses the Caracara leaves in her body to crystallize Sycorax causing Mumm-Ra to retreat. Soon after, Ponzi and Lucy take their leave to start their business anew.

Bolkins

The Bolkins are sheep-like people, similar to the Wolos. They are herdspeople and farmers who are just as likely to call for help from the ThunderCats.

* Bundun and Hurrick (voiced by Bob McFadden) - Two Bolkins who are friends with each other. They were the ones who accidentally released the spirit of Grune the Destroyer when they were trying to escape from the bad weather. After Jaga's spirit defeated Grune the Destroyer, Bundun and Hurrick were forgiven for their mistake by the ThunderCats.

Tabbuts

The Tabbuts are a race of wealthy yet greedy traders who often appeared as allies of the mutants. They resemble one-horned humanoid pigs in appearance. A ninja that worked for Mumm-Ra once assumed the form of a Tabbut.

Fishmen

Exclusive to the 2011 series, the Fishmen are one of the native sentient species of Third Earth and resembled humanoid fish-like creatures. Fishmen sub-species are mostly based in appearance on the Ostariophysi-based fish and include carps, suckerfish, loaches, goldfish, and minnows. A group of their kind lived in a paradise oasis, somewhere in the Sand Sea until their home was attacked by the massive Ramlak, which consumed all the water of their home. With their home destroyed, Captain Koinelius Tunar, became fixated on getting revenge on the creature and assembled a crew of Fishmen along with a ship to hunt it down. Their journey saw them encounter the ThunderCats, under Lion-O who they captured, and initially attempted to flay as well as eat until the Ramlak attacked. Upon seeing the courage of Lion-O, Captain Tunar decided to let the ThunderCats live and asked for their help in slaying the beast. Ultimately, the Fishman's ship was destroyed by the Ramlak and Captain Tunar was killed but Lion-O managed to slay the creature leading to all the captured water being released into the Sand Sea thus creating an oasis for the Fishmen. The Fishmen thanked Lion-O, assuring him that Tunar's death was his own doing and was beyond help, and decided to remain behind at their new home. In "What Lies Above" Pt. 2, Wilykit and Wilykat were able to get some of the Fishmen to help them fight Mumm-Ra and save Avista. One Fishman rode with Wilykit and Wilykat since it didn't want to ride in the Forever Bag.

* Captain Koinelius Tunar (voiced by Robin Atkin Downes) – A member of the Fishmen race who was driven to vengeful rage by the Ramlak stealing both his homeland and his leg, the latter he replaced with a metallic peg leg. He later took command of a ship and assembled a crew of Fishmen with the task of hunting the creature down, claiming actions were in the crew's best interest yet places killing the Ramlak at all costs before them. Encountering the Thundercats with the intent to make them into chum to attract his quarry, Tunar reconsiders once seeing them fight the Ramlak and makes them part of his crew while finding common ground with Lion-O, who is also out for revenge on Mumm-Ra. However, while Lion-O lets go of his revenge to save the Fishman's crew, Tunar became a victim of his own revenge as he is dragged into the Sand Sea while harpooning the Ramlak. Lion-O managed to avenge him by slaying the Ramlak.

Elephants

Exclusive to the 2011 series, the Elephants are a giant grey-skinned race brought to Third Earth when the black pyramid fell alongside the other Animals that Mumm-Ra enslaved. A normally passive race that rarely fights, the Elephants are spiritualists who don't have much of a good memory and can speak in an Indian accent. When the ThunderCats encounter their colony while on their search for the Warstones, the Elephants reveal that they have one yet forgot the item's exact location in their village. After the ThunderCats returned from the Forest of Magi Ore, the Elephant village was attacked by Grune and his forces. The ThunderCats were able to save the village and its people from the Lizards occupation, with the Elephants later coming to conclusion to aid in fending off the invading forces.

* Anet (voiced by Kevin Michael Richardson) – Exclusive to the 2011 series, Anet is a member of the Elephants race and is an ally of the ThunderCats. Anet appears to be a high-ranking spiritual leader among the Elephants. After he and Lion-O meet, Anet personally instructs Lion-O in the use of "Sight Beyond Sight". Anet has the ability to see visions of the future, telling Lion-O of the betrayal yet unable to specify it to be the king's relationship to Cheetara. In "What Lies Above" Pt. 2, Anet and some of the Elephants were recruited by Wilykit and Wilykat into helping them fight Mumm-Ra and save Avista. Anet stated that they are doing this to repay Lion-O.
* Aburn (voiced by Jim Meskimen) – Exclusive to the 2011 series, Aburn is also a member of the Elephants race, and is an ally of the ThunderCats. Aburn is the first of the Elephants to speak with the ThunderCats, befriending Wilykit and her brother while overhearing the former playing her instrument. During "Into The Astral Plane" Grune held Aburn hostage in order to force the ThunderCats to surrender, prior to Tygra was able to slip away and save everyone using the ThunderTank.

Dogs

One of the many elements featured in the 2011 series that seems to have been "inspired" by the Wildstorm/DC Comics mini-series, the Dogs were a rival species to the Thunderians. Each of the Dogs are modeled after Doberman Pinschers, jackals, wolves, foxes, Labrador Retrievers, Mastiffs, Bulldog