芥子, Mustard
Karashi is the rabbit from the story FireCrackle Mountain and one of the best tormentor demons in Hell. Although appearing innocent and cute at first glance she claims her motto is slow retribution and wishes to fight against todays poor morals. She seems to bear a grudge against the crimecommitting raccoon in FireCrackle Mountain as she keeps a diary where damn that raccoon is written repeatedly and goes on a wild rampage every time he is mentioned. Despite her inner violent nature she has the typical attention span of a normal rabbit stopping halfway through her selfintroduction when she spotted a grassy spot to eat and lie in. Source: Hoozuki no Reitetsu Wikia