Джюраку Сачіко

Sachiko is the former Vice-president of the Student Council before Ririka took her place due to an unknown reason. She is the former Public Morals Committee Chairwoman of the Student Council.

Sachiko is an extremely sadistic person with no empathy for others. It is her pleasure to hurt people both physically and mentally to the point of completely breaking their identity as humans, which is the reason why she keeps Mikura on a leash for the most part.