Yusaku may be the first Yu-Gi-Oh protagonist who is an anti-hero. He is not a bad person, but he can appear cold and apathetic. Yusaku is described as a boy who doesn't like standing out at school, not that he's timid or shy but because he is a hacker. Due to a certain incident, he generally tries to avoid contact with others and only seems to trust Shoichi Kusanagi. However, he gets drawn into encounters with people as he tries out Dueling for once.