Cerberus

Cerberus is Hades' three-headed guard dog whose main duty is to guard the entrance to the Underworld.

HerculesEdit
Cerberus first appears when Hades is riding down the River Styx and is fed a massive steak. Later, Hercules tames the beast and uses him to get to Hades inner sanctum, though this is only a temporary turn driven by fear.

Role in Ultima
Cerberus, being the guard dog of Hades, is naturally loyal to him and his new partners, the Organization. Cerberus is not a true member of the Org, instead his job is that of a Grunt Monster.