Ishisaki is a student in Class 5-3 and Satsuki's classmate. In Episode 15, when Teacher Sakata is doing the attendance list, the second name he calls is Ishisaki. After Ishisaki's name is called, he says "Here!". He appears sometimes as a backgrounder character. He is one of the students that are being controlled by Ohma in Farewell, Amanojaku... The Arrival of Ohma.