During his youth, HERO is the peacemaker of the group, who tries to restrain his friends whenever they get too worked up. He is described as having a mild personality and passionate in domestic work like baking, cooking, and cleaning, making him an ideal employee. HERO also has a charismatic side that he uses to charm others.[9][10] His charisma allows him to convince others to go along with his requests, get discounts from MAILBOX and befriend animals like EMS. However, he can  sometimes be a 