Rin, whose full name is Rion Arihara, at first impression is a very cold and antisocial person. He usually talks little, and never tells anyone about his life. No one knows, that his name is actually fake. No one knows, that he was never a bodyguard, but a hired killer. Even with a job like that, he never lost that empathy of his. He has his own rules, to not hurt women and children, to protect them. He has 3 little sisters and his grandma, the people he has to support. His father, a famous politician was sent to prison, his mother, who couldn't bear such tragedy ended her life. Even so, acting so distant, if he actually gets close with a person, he will be willing to give his own life just to protect that person. And not only his life, but almost any other. He becomes protective and even dependent on that person. Also, he is good at playing piano, cooking and shoot with firearm of any kind. He smokes.

