Carasso

Carasso is a human adventurer how has gotten himself into a bad situation.

While searching through the eight and final level of the Abyss in Ultima Underworld I, the Avatar heard someone in a room of the easter side of the level. Smashing the door open, the Avatar found the half-starved Carasson, who'd been locked into this cell by Tyball. After giving him food, Carasso told how he'd found the bones of a powerfu lwizard (Garamon) to the west. He also gave the Avatar a key that would open the door to a path that led to the chamber of virtue, but warned of a powerful Stone Golem, before leaving for the upper levels.

Most likely he was saved by Garamon, when the volcano errupted.