Warashibe is a college student who is infatuated with Miho Nosaka, and is good at Capsule Monster Chess. He has a habit of sucking lollipops. He tried desperately to gain Miho's attention by giving her several Capsule monster pieces, but Miho never understood that he loved her. Warashibe pretended to be a hero in front of Miho by saving her from a guy, who was really Yugi in disguise. However Miho recognized Yugi the moment she saw him, even with a bag over his head. Also Warashibe's appearance (meaning how he looked) didn't meet her expectations. Warashibe tried to invite Miho to his secret base, but she refused and slapped him after getting too creeped out. Embarrassed by what happened, Warashibe poisoned Miho's friends with unboiled water, thus prompting her to confront him. She located