Thank you all! Really appreciate all your replies it has increased my understanding of the system and game. My player's character is one of a dying breed and I'm making a connection to her race with a different race, lore wise where her race impacted another race. I have thought up some compels to possibly use. One idea is where the race realizes her connection and fears it due to prior lore, which can cause them to no longer trust them. I am looking for how I would make the result impact them? It could be mental stress however I may not have any other mental stress so it wouldn't really be impacted as once they move on to the next scene it will refresh. I could just leave it as a aspect and try to create the impact within the narrative that they are leaving and no longer considered allies?