Sethys

Sethys is a follower of Chaos and was left behind on the Serpent Isle after the War of Imbalance was over.

The Avatar discovered him in Ultima VII Part Two in the Temple of Tolerance, where he had been kept alive all these years. He told him/her that he had lost his key for the drawbridge. Later, the Avatar needed to summon the Chaos Hierophant. Sethys offered his help. However, walking out of the temple caused him to age rapidly and he barely managed to tell the Avatar where to find his master's body and that he/she needed the Eye of the Serpent to summon him, before perishing after aging hundreds of years.

The Avatar took the Eye and used it to summon the Chaos Hierophant, who after the session escaped to the void to join Sethys.