That's literally the bread and butter of fukumori, the pillar foundation. It's their origin.

Oh... This is a good question. I have a very neat collection of what Mori kink would be:

A true love from someone he loves.

I hc that he's into dom/sub whether as sub or dom, and love a rough play BUT this only for a coping mechanism. Like, in a kinder world where he's not the port mafia boss, he wouldn't have kink. His true desire is a deep connection with someone he loves. His freakiness is just a facade. He's kinda authoritative outside the bedroom, but he's actually vanilla in bedroom.

I'm not into it because Elise is not my type and I see Mori as bottom so it won't work for me xD but I think it's pretty good ship, but it looks more of like selfcest than anything tbh. I also like the idea of "Elise is Mori's wife" but more of Elise is like a wife in a sense that she'd always be there and always beside him no matter what.