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Другие имена
Yui Yajin
夜陣 唯
Юи Ядзин
Yui, the first person who knows that Kei is female. He's the reason Kei's in the school in the first place as he was the one to give the idea to Kei's mother. Yui is highly manipulative which is shown in the story he told Kousuke.
