I renamed the comic

"Nyashka" is a noun that comes from the root "nya". "Nya" originally means "meow" in Japanese, but eventually the interjection took its place in the slang of other languages. Wiktionary (Викисловарь) says that "nya" means "expression of adoration and tenderness" and I would say that this interjection is used when something or somebody really, really cute is around. Actually, "nyashka" is a Russian slang word that is used to describe something or someone kawaii by definition.