That was way too predictable, but I guess only Delioras would fit, considering Gray has no other thing in his past, to explain a different demon. Good progression nonetheless.
I hope Gray's character gets explored in another angle, literally every conflict or fleshing out he has, is tied up to Ul, and his tragic back story, getting kinda boring, as I was always indifferent about Gray, let's see if that will change in the future.