Tomiko Asahina

Satoru's grandmother and also the head of the Ethics Committee. She intends for Saki to succeed her position as she possesses a strong mental stability as well as qualities of a leader. Because of this, she had asked the Board of Education not to dispose of Saki and her friends despite knowing about the true history. She also revealed that they were responsible for erasing their bad memories of the past to protect the minds of the townsfolk. She also had a close encounter with a Fiend in the past.

(Source: Wikipedia)