Flesh is a Shikabane Hime.
Flesh died in an accident on her way to Akihabara. It is never mentioned why exactly she was turned into a Shikabane Hime. She doesn't fight much in the show Shikabane Hime but when she does she is seen using Giant Shurikens and Large Machine Guns. Flesh is very much an " Otaku". She's into Anime, Samurai, Ninjas and Hentai material. Her contracted monk, Kanechika Umehara, is pretty perverted too so they're a great match. Flesh also seems to dress similar to ninjas from Naruto.