Rikka's Grandfather

He is the grandfather of Rikka and Tōka Takanashi.

He is voiced by Hiroshi Naka. In the English dub, he is voiced by David Wald.

Personality
Contrasting to his wife, he is very strict and by-the-numbers. He does not share the same tolerance for Rikka's chuunibyou mannerisms the same way his wife does, and refuses to accept them nor Rikka the way she is now, remarking that he hoped she would have gotten her act together at her age, much to his wife's ire.