Rei is a skilled assassin and a mafia’s son. His fighting abilities and marksmanship are extreme. At work, he’s focused and shows little emotion. He is an expert shooter and sticks to the tasks. At home, he has a shut-in attitude, barely speaking or making eye contact. He plays video games and relies wholly on Kazuki to do tasks around the house. Despite his hate to expressing them, he does have emotions. Miri is his adopted although he doesn’t know how to care of her. Akane is his girlfriend.