Brother to Kaoru Shimizu. First seen back in Season 1 where he asked his sister "Is baseball fun?" Returned again in Season 3 as a new member of Seishuu Baseball Team where he played as a shortstop. He is the youngest in the Seishuu Baseball team being a freshman but he is the most talented second to Goro.With his excellent speed and skill he helped put up a fight against Kaido.

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He also helped to take over the mound when Goro was injured by Egashira during their practice game with Kaido.

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Later on he became the captain of the Seishuu Baseball Team and once again challenged Kaido with his new teammates.