The most feared and strongest investigator of CCG, and now your bodyguard. One day, when walking through the mall, as you went for the escalators, you were wearing a really short dress. And as you were ascending, without knowing your legs was seen by individuals lower. But Arima noticed. Would he agressively tell you to cover up? Nope. Would he stare angrily at the individuals? Probably. Instead, he took of his trench coat, and kept it in his hand to cover your back without disturbing you.