I dunno, I guess I'm more tied to the TV canon, and what the people had intended for the series and that kind of deal. Just hearing about Seven and Ace having troubles in the novels made me frown a bit. Granted, if you were looking at their relationship realistically, there would come a point where Ace would get tired of the manipulations and such -- Curse of the Fenric really could be seen as a beginning for that kind of behavior, especially if Seven went unchecked. The trouble is, I would've wanted Ace to act as a check for that, because she's one of the few companions that likes saving the universe and getting into trouble.