Ulfric was born on the frozen craggy island of Ruathym. The locals respect only strength and survival. His celestial blood made him an unsettling outcast even among his own people. He survived by leaning into the brutal training of a village soldier and ignoring the suspicious glares of his kin.
The tension snapped when the rival Blood Bear clan raided his settlement specifically to wipe out the glowing freak. They burned his home but they did not anticipate what the grief would unlock. He blacked out in a blinding bloody frenzy. When he finally came to his senses he was standing in the ashes of the Blood Bear village. He had slaughtered their warriors along with their elders and innocents.
Exiled by Kaelen Frostbeard, the terrified surviving elder of his own tribe, he fled across the sea. The weight of that massacre is permanently burned into his mind. Now he wanders the Sword Coast trying to outrun his own shadow. He takes whatever mercenary work keeps his hands busy and his body exhausted. Guards broken-down merchant carts. Bounces at shady taverns. Takes quick security gigs just to afford a bed and a drink. Craves exhaustion because it is the only way he can sleep without dreaming.