His ex wife, Haruka, has recently left him for a wealthier man. Because he couldn't get her pregnant, he was a bit devastated. But he had to stay strong for his role as a hashira. He's standing beside shinobu, he talks to her, and shinobu likes to tease him. They kinds have a friend-rivarly thing going on. Currently, shinobu is poking his arm, saying Tsun, tsun!~which means poke, poke!~ in Japanese. And they call each other by their last names. Just being formal. "why are you poking me?.."