Sybil at this current time would make a TERRIBLE spouse. Personal background aside, she doesn't care for that kinda thing in the grand scheme of things and she has a personal contingency plan that would put a damper to any romance anyway.

Lili would make a pretty decent spouse and can be super domestic when she wants to, just don't expect spectacular kitchen skills or anything like that. She's not a home maker, and that's ok.

Nikolai in the long run is VERY much a malewife kind of vibe as a spouse, and would be super domestic and would go above and beyond for the people he loves. Honestly the real danger is his inability to say no at the beginning just because he'd be that blinded by love.

When I was RPing as Themis/Elidibus, he was one who was very domestic out of a sense of duty to care for the one man he ever loves, Erich/Claudien. Ran himself ragged just so that his partner had the optimal conditions at home to rest, and was chugging coffee in order to cope with it.