Fultheim is a Nord who stays at the Nightgate Inn. He possesses a Blades Sword. The inkeeper Hadring explains that Fultheim is at the inn "drinking away a lifetime of bad memories." He will attack the Last Dragonborn if he is approached while wearing a set of Thalmor Robes.
The Dragonborn may ask him about the Orsimer Balagog gro-Nolob, who also resides at the inn. Fultheim comments on how Balagog "likes people, and wants to talk, but stays separate because he is supposed to."