@Imonlyhere4tea I like to leave some things open so the reader can interpret it any way they want so I won't say this is definite but in my head, she did get married in the end.
After all, so many men were courting Kii when she was still living there that only few looked any other girl's way, even less so at her. But after everything, they started noticing other girls again and even she got married at some point. But I don't think the relationship would be healthy with what kind of person she was, she manipulated everyone in her jealousy so I think she would be very manipulative even to her husband.
Maybe she would seem like the perfect wife because she'd have what she wanted, but she would still dream of other, perhaps better looking or wealthier, men and not really love her husband so they would often fight behind closed doors when they didn't have to keep up appearances. She would be married to him just to be married, not for him as a person, you know what I mean?
And I think that maybe, the man who married her would have also only done so to be married and not for her, she wouldn't be his first choice because her character wasn't really nice.
So yeah, that's what I think would happen with her