I specifically mentioned Koschei rather than Baba Yaga because I know there are stories where Baba Yaga isn't pure evil (although I know of rather few Slavic fo

I specifically mentioned Koschei rather than Baba Yaga because I know there are stories where Baba Yaga isn't pure evil (although I know of rather few Slavic folk tales, not trying to come across as any kind of expert here!). I don't know of any story where Koschei is benign. I have some trouble seeing how that would work out for a character whose defining attribute is having used dark magic to cheat death.