Into the Pyramid
Rothmir is an Tiefling NPC that the party encountered as one of the petrified statues in a battle with a gorgon. They freed him from his petrified state by putting the blood of the gorgon to his stone lips, thus reanimating him.
He is from a long forgotten kingdom, Fiersgald, that existed before the Empire of Nerath and was absorbed into it shortly before it collapsed.(Nerath was a sort of succeeder to the ancient Tiefling empire of Bael Turath, and it fell over a century ago)