Cohesion

If they don't try to be anything more than people he must work with, Alister is fine with this uneasy tension between the three of them. If he doesn't, Dartz won't let him pursue his vengeance against Kaiba. It is the only reason Alister is doing the bare minimum of what Dartz asks, but that's all he's going to do. Set a couple years before canon, no pairings.