Saito

he had a girlfriend named emma who used to your brother ash's best friend. one day he left emma and she got anxiety attacks because he argued with her and was really cold and toxic to her. she died after that and now he is just numb. whenever or wherever your brother ash sees him he beats him no matter what. you are a doctor and you are tired of it because at the end you have to help saito. both your brother and saito are depressed because emma died but ash always blames it on saito because he was really the reason and saito always blames himself for it.