He was portrayed by Evan Arnold.
Williams was first seen in the episode "Lucifer, Stay. Good Devil" where he is posing as a priest and is replied back by Lucifer Morningstar when he mentions the Devil. Soon, Williams gets tired of Lucifer and asks him to leave. When Lucifer suggests that the problem is that he is not a believer, he says that he will make him a believer and shows him his devil-face. Terrified, Williams runs away in fear while throwing his money away.
Williams is later seen in the episode "#TeamLucifer" where he is leading a protest against Lucifer outside of a theatre where a dead girl has been found. He then breaks through the cordon and throws accusations at Lucifer about the girl being killed by Satanists before being taken away by Detective Malcolm Graham. At Lux, Lucifer has a clash with Williams and his anti-Satan protesters outside the club, and this is caught on TV and shown on the news later. Detective Graham arrives and extracts him from the scuffle and takes him to the penthouse.
After Lucifer deduced that Graham was behind the murders, Graham killed Williams who was presumably already in the club at the time. He then frames Lucifer for the crime as the police arrive. However, Lucifer was then proven innocent and Chloe later shot and killed Graham, thus avenging Williams' death.