For the relationship that would have been better not existed, no thought, clearly the kismesissitude between Kanita and Dovika.
Neither of them had black feelings for each other, they end up like that because of bad dealt trauma, and they got nothing worth out of it. They will eventually break it off, but really not a good relationship.

And for the one that would need to exist, it was SOOOOO hard to come up with one, because well, it's my ocs : i want it? i make it.
Buuuuuuuuuut lucky for you, I thought about one, and : Niarre and Cledio in red.
They don't interact in my canon, and even if they would, they both got red relationship/crushes and would not really be in the mindset to get one more. But I think they would be cute and good together!
So at least, have this cute drawing of them hehe (the drawing is on my twitter)