@SaarebasI want to see what is up with him and Amethyst. They hint that maybe she might have liked him at one point and was jealous of Rose but not sure. It could be that she didn't really want him to take Rose away and leave her behind so she tried to be friend with him so she would be important too. Not sure.
We know that Pearl and him don't quite get along since they were in love with the same person (or that is what it looks like to me)
Garnet and Greg seem to have the type of relationship so far where she gives advice or explains things he may not understand but Garnet does the same with Steven so it is hard to say.
Either way, something must have happened with the other Gems and Greg since he has that thing where he isn't allowed to get in the way of the magic stuff. Hmmmm so many questions!