Ulf the White pops up a few times throughout the second season. He witnessed the hanging of the ratcatchers after the murder of Targaryen toddler, Jaecaerys, and he was also in the bar when Aegon took his new Kingsguard knights out for a drink.
During the boozy night, Ulf quietly explains to the table that his father was Baelon the Brave, which makes him the illegitimate brother of Daemon and Viserys Targaryen.
In episode seven, Ulf reluctantly heads to Dragonstone after some encouragement from his drinking buddies. But he flees through the caves when Vermithor reacts badly to the crowd of Targaryen bastards.
During his escape, he comes face to face with Silverwing — who, luckily for Ulf, doesn’t burn him alive. He’s later seen flying Silverwing above King’s Landing, which terrifies the guards because they think they’re under attack.
While Ulf is on Rhaenyra’s side for now, he defects to the Greens in the book during the Hightowers’ siege of Tumbleton.