Masamitsu is an ass. Theres no way around it. As the SHSL Logical Genius, he views himself as superior to others based on intelligence. He would be extremely useful during trials if it weren't for the fact that he constantly kept quiet. He seems to act rude to everyone when he does talk to them, but acts especially terrible towards his sister Natsuki. He often expresses a hatred for her, stating "the only reason she ever got through life was because of me. She's aware of this." Despite these claims she often tries to talk to him normally, and gets extremely sad whenever pushed away.