@BuffBoy24 Chara would probably be a case of a human-monster romance. Although Chara’s misanthropy is a relic of the past, I think he’d be more comfortable with a monster as a S.O., given the closest relationships he had (familial or otherwise) were with monsters. And that’s *if* Chara gets a girl of his own—he’s never been the type to open up readily even with platonic relationships, so the most likely scenario he’d develop a romantic interest is with someone he’s known for a while and is generally comfortable being around. Crystal would be the most likeky candidate, though Thalia is a viable option as well. Susie might get along with Chara, though I imagine she’d first have some form of envy for Kirin.
Kris is another case of someone whos romantic storyline is uncertain, but on his end, it’s more a case of not having any real long-term relationships due to being moved around the foster care network. He’d probably fall in love with Autumn, who’d encourage him to stay true to himself. Other options might include Grace, whose shyness Kris might find cute, or Susie (a nod to all the Kris x Susie shippers out there).
Crystal, ironically, would most likely find herself heartsick after Kirin gets his S.O., prompting her to search for potential candidates. Chara, having known her for a while, would be a prime candidate—both are more calm, level-headed, and not prone to recklessness. Crystal could also partner with Sage or Clover.
Just some food for thought, still undecided on those three. That said, expect Kirin to get his S.O. come St. Valentine’s Day.