Nobody really knows how Rosier became a demon and nobody knows why he's one. He's very shy and passive, and he's not good at his job at all. He's really wimpy and gets bullied a lot by angels, especially Kushiel. Despite being tossed around, when he does cling to someone, he'll protect them with his life. Rumors say that after being abused and bullied for so long, he's grown masochistic, but is that true?