In his initial appearance, Michiru has a mysterious and cold demeanor, not going out of his way to talk to others. He is antisocial and is often seems to be living in his own world, being a bit airheaded at times.Michiru has been invited by Jinki Mukae as one of the Deluxe tournament participants, ranked the 1st Place in Group D, defeating all his opponents in the preliminary and quarterfinals then made it to the semifinals, where he lost to Yu-yu Kondo, preventing him from reaching the finals.