Li'l Ultimate P.E. Masaru is a cheerful, hot-headed showoff and seems to be the one who has a more goofy outlook on life. He is extremely energetic and constantly brags about his role as the Hero and leader of the Warriors of Hope, despite the circumstances of how he became "leader" (by winning in Rock, Paper, Scissors). He loves praise and fame. He is also very playful, naughty, and mischievous. He likes to boss around others due to his role as the leader and seems to enjoy pranks. He is one of the more child-like and less intelligent members of the group, enjoying very childish jokes, stomping his foot in frustration if things won't go his way, and being completely unaware of what is truly going on. He also seems to have a habit of remembering certain words incorrectly. Although Masaru is childish and arrogant, he does genuinely care about the people he leads. He wants to make sure that the kids won't need to feel afraid anymore and he forces himself to be brave for them. He takes his role as the "Hero" very seriously and works hard to live up to certain hero tropes, like being fearless and never losing. Though he usually appears very cheerful, he can get very upset and break down crying if he is reminded of his abusive past.