Hikaru Zaizen is considered to be a genius. He is the doubles partner of Oshitari Kenya. Zaizen is not respectful to his senpai, often calling them "sick/gross" (and calling Kenya "weak-minded) as well as dissing Chitose after Chitose lost to Tezuka. He is voiced by Hirofumi Araki in Japanese media, Hisanori Satou and Kawasumi Bishin in the musicals.
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