| abstract | - Kei Tanishi (田仁志 慧, Tanishi Kei) possesses a large body, which allows him to utilize his "Big Bang" serve that uses his weight and the gravity from falling in order to make a nearly nonreturnable serve. It takes a lot of stamina, which decreases its power over time, allowing it to be returned, which was taken advantage of by Ryoma. He is one of the former rivals of Ryoma who return to help him regain his memories.
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