Her party lifestyle may not be his particular jam but this couple match up WAY more than I realized lol both are boisterous? Loud? Extroverted? Big siblings? Fighting spirit? Jacked to shit? BIG EATERS?? I mean shit, canonically Fumiko, though mostly uses water breathing techniques to move the sake, can use some flame breathing techniques when she intentionally sets the sake on fire. She would out-eat this man in a contest once and boy is ring shopping after a year of proxy friendship through tengen lol
He (and Sanemi) are definitely later game options, after she's kinda realized a lot of at least her hypersexuality and alcohol consumption are based in family issues and chills out abit. I still think it's mostly tengen since she's close with him and his wives but I like this little branching path.
I'm gonna call him Rengoku. Some people will hate that. I do not care in total honesty.