I think that our role function is something that we're more concerned with than our dual is. When we bring up role concerns they'll tell us that we're worried about something that doesn't matter.
The 7th function is described as something we use arrogantly or aggressively, but I don't think that's the way we typically treat our dual... at least not one we're on favorable terms with... it would be used more in defense of them when they're being criticized in areas related to their role. If someone's giving them a hard time, we'd use our 7th function to talk down to or about the person criticizing or making demands of our dual.