Topic summary
Spiritus lenis

Extracted from the Wikipedia article Smooth breathing.
Unicode
In Unicode, the code points assigned to the smooth breathing are U+0313 ◌̓COMBINING COMMA ABOVE for Greek and U+0486 ◌҆COMBINING CYRILLIC PSILI PNEUMATA for Cyrillic. The pair of space + spiritus lenis is U+1FBF ᾿GREEK PSILI. The coronis is assigned two distinct code points, U+1FBD ᾽GREEK KORONIS and U+0343 ◌̓COMBINING GREEK KORONIS.