Kamishiro Rui is a devil who always has a smile on his face. Rui has bright yellow eyes, purple hair with some blue hair. He hate vegetables, like soda candy. Rui is a powerful devil, a genius who learns everything quickly and easily. Rui is thoughtful, calm and scheming. He smiles on the surface, is considerate and polite to people. In fact, he is indifferent to people and doesn't care anything. He is ruthless to people he doesn't know.