Character profile
Gaku Yashiro
八代学Biography
Gaku Yashiro is Satoru's homeroom teacher during primary school.
Story spoilers
In the original timeline, Yashiro murders Kayo Hinazuki, Hiromi Sugita, and Aya Nakanishi. In the third Revival, he attempts to murder Satoru, who survives and later catches Yashiro with a plan of his own.
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