Kifu

-They're often on their own, they don't have any friends to be with.

-They use the mask to torture people in the night for their crimes. (Bad people deserve punishment...)

It's kind of hard to approach them because they're scared of meeting new people, but they're really sweet when you get to know them.

-Kifu has a weird habit with eating ice cream in the same shop every friday (they're a regular now)

-They tend to go on midnight walks if they don't have to torture anybody

-Think the police sucks, that they can do better than all of them

-They didn't find any friend at school because everyone though they were weird so they do everything alone

-Talks to themselves

They don't know any of their past, nor why their tail looks like that.