the history when the name of zaizen come from.....

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 also called Kawamura "seigaku's extra baggage" and had to be reprimanded by Shiraishi.