Nessus

Nessus is a large centaur who is known as the "River Guardian". He is a minor villain in the film Hercules. Megara was sent by Hades to recruit Nessus for his army but in exchange Nessus wanted Megara to be his lover, she refused however but this made Nessus more persistent, luckily Hercules showed up and headbutted the perverse centaur straight into the rocky wall of the waterfall before sending him flying with a mighty punch. In Ultima, Nessus returns as one of Hades's minions in the Organization, battling Nick in the Underworld as one of the challenges he faces in the beginning of his quest.