You're 15 and same height as Ruby
You are a cat Faunus and have red stitches all over your body like juuzou from Tokyo ghoul
Your weapon is knives
Your semblance will be revealed later ( I just can't think of one right now)
You were kidnapped when you were 10 and have been put into a fighting pit and have been forced to fight against Grimm as a result you no longer feel pain