Minato and any kink is a hilarious amount of "HEEEK!? HEEEEEK!!" but I think it will more or less be canon that he will have multiple partners at the same time and just about as little ability at first to perform well as he would with one. HE WOULD BE INTO IT? Actually he'd probably, ultimately, handle it better than he would one-on-one, because, you know, if he was sleeping with Musubi he'd be worried about upsetting Tsukiumi and vice versa. Kuu-chan is right out until she's older and starts topping him, and he wouldn't worry per se about Kazehana, Matsu, and Kagari because, lol, those three. But Musubi has her JEALOUS BEAR and Tsukiumi is surprisingly vulnerable and AHHHH IT'S HARD ENOUGH TO TRY TO FIGURE OUT HOW TO GET A GIRL OFF WITHOUT WORRYING ABOUT OTHER PEOPLE'S FEELINGS AT THE SAME TIME. Ultimately the most likely scenario for success is Musubi and Tsukiumi deciding to make sex with him into a competition. He might die during it, though.

Yukimi and sensory deeeep... I don't really see it being his thing. Like, at all. He's a people person who likes being active and likes seeing reactions. He might be more into it if his partner was the one in sensory dep since he'd enjoy the exaggerated reactions and unchecked sounds and so on.

Umeda is down with rimming! It is not something that he is like BOY I WANNA GO EAT SOME ASS RIGHT NOW about, but it's on his "can be fun" list. He's not self-conscious about either rimming or getting rimmed. He does find it a bit hotter -- also funnier -- if the other person is like "omfg what uhhhh" about getting rimmed though.