Rikka's Grandmother

She is the grandmother of Rikka and Tōka Takanashi.

She is voiced by Sumako Nomura. In the English dub, she is voiced by Allison Sumrall.

Personality
Unlike her husband, she is far more welcoming to Rikka and her friends, as well as tolerates her chuunibyou mannerisms better than he does.