Is this part of that brief Pixiv trend where a witch took a slave and ended up marrying or adopting him? I think it was a keyword on Pixiv, but I don't remember what runes it used.
Guessing on Sakuya due to the hair and braid. Same with Sumireko due to the pigtails and glasses (and Mokou's pants). And I wouldn't have guessed Reimu if not for the hair tube and torii, or Ichirin if not for the unzan decal on her hat.
I've tagged a few more animals, but a few I'm not sure of. Is that Kagerou on top of Momiji? Which bunny is that, Tewi or Reisen? And who's the fluffball on Shou, doesn't look enough like a mouse to be Nazrin.