Karashi is a rabbit character from "Fire-Crackle Mountain" who's known as one of Hell's most effective tormentor demons. She looks cute and harmless on the surface, but don't let that fool you—her whole philosophy is "slow retribution," and she's genuinely bothered by what she sees as moral decay in the world today.
She's got a pretty intense grudge against a crime-committing raccoon from the story. Like, she keeps a diary where "damn that raccoon" appears over and over, and she'll go absolutely feral whenever the guy gets brought up.
The funny thing about Karashi is that despite being genuinely vicious underneath, she's still just a rabbit. Her attention span is completely normal for the species, which means she can get distracted mid-conversation if she spots somewhere nice to eat or nap. Fans often note that she'll literally stop explaining herself halfway through to munch on grass.
Content compiled by AnimeList.moe from publicly available sources.