All right. So...while we've only got one romantic relationship, they've got this complicated system of four. They call them quadrants, and each is associated with one of the four suits of cards. Two red romances, based on pity, and two black romances, based on hate. Here's a brief rundown of each.
Matespiritship. The flushed quadrant. This one is the one most like our romantic relationships. If we were trolls, you'd be my matespirit.
Moirallegiance. The pale quadrant. This one...it reminds me of your relationship with Remus a bit. The way Remus is the voice of reason and the way you became an animagus for him. It's about two trolls looking after one another, keeping each other out of trouble, that kind of thing. So I think that Remus would be your Moirail.
Auspisticism. This is where one troll acts as mediator for two other trolls. Hate is a huge part of their emotional spectrum and apparently a lot of them end up killing one another for one thing or another. So an auspisctice keeps two trolls who hate one another from killing each other. Or from having hatesex, because that is also a thing. Which brings us to the last one.
♠ Kismesissitude. Two trolls who hate one another more than anything in the world relish that hatred and form a relationship. They don't want to kill the other troll because then they wouldn't have that object of such hatred anymore. And apparently there's a sexual component. Which is very strange to me. But that's just how they work, I suppose.

Does any of that make sense to you?