Unless I was mistaken, in Cry Wolf it was suggested that Bran is over 1200 years old and was the wolf that spawn a lot of legends including Bewoulf. So my question is does the Fae know about his past and that Bran was the Berserker?
I always thought the way that Fae lord backed off Mercy so quickly when she found out that Mercy had the protection of the Marrock was a bit odd and extreme. However, it would make a lot more sense if that Fae lord knew that Bran was the Berserker and would explain their extreme fear of him.