How about Gamzee c3< Rose c3< Terezi? (I think that's the order it goes in?)
I really like the idea of this happening in canon. Not because it would be a properly functioning relationship, but because it could lead to some really awesome stuff within the story.
I want to see Kanaya trying to teach Rose the ways of an auspistice, but it would be terrible advice because Kanaya is not a very good auspistice. Then everything would go to shit and eventually there’d be a big huge battle and someone would get all kinds of injured and it’d be awesome.