The Archangel Sullivan was one of the fallen archangels mentioned in the Book of Chihiro of the Holy Writ.

According to scripture, he sided with Shan-wei when she rebelled against the Archangel Langhorne, and later taught humanity gluttony and self-indulgence.

He was actually based on a member of the Operation Ark command crew who supported Dr. Pei Shan-wei at the Alexandria Enclave. (OAR)