Cipher swap au brain Rott

The head of the Tsugikuni family, and the Kamado siblings' + Tokitou twins' grandfather, no matter how uncomfortable he feels being addressed as such

He likes being called Grandpa Michi the most

He's 60 years old

He has a prosthetic leg, and he doesn't say anything about what caused the accident

Yuichirou hypothesizes that whatever happened to his leg correlates to his hatred of cars

Suspiciously, the side of his face is either covered or filled with mascara, which Muichirou notices but doesn't say anything about it

Quiet and takes things to literally; is gentle with children but wary around teenagers

Owns a dojo and teaches them basics in kendo and other forms of martial arts

Employed Hakuji to help him with miscellaneous things around the dojo, secretly and tries hard not to view him as a son he never had

Furtively distant towards his own wife, Haruhime, and often only interacts with her for usual things

Likes the feats of prodigious strength that Muichirou exhibits, but is hard on Yuichirou for no reason at all (or that's what he thinks)

Always dressed lightly but formally, rarely exposing his bare back or his legs

Yuichirou caught a sliver of what he thought is a tattoo up his back however, but Michikatsu dismisses him

His wedding ring is, notably, a lot different from the one Haruhime wears on her finger

Incredibly smart, but he says he's not interested in intelligence and conversations that range in science, no matter how brilliant he is

Very fast despite his prosthetic leg, and even as an old man his physique is strong at his old age

Has a reputation of being a kind affordable old man around Ikusaka, and performs acts of service