The sources checked do not record mischu as a name or as a word with a meaning.
Affection
Cute
Gold, Brown, White, Black
Any Size
Unisex
Others
M
6 Letters
Not documented; recorded as an Armenian feminine given name
Alteration of Glaswegian with the suffix -ie
Recorded as a given name in Ancient Berber, Filipino and Biblical use
Italian for 'darling' or 'cute'