|“||Now you'll never know what I want.||„|
| — Sinnerman to Lucifer to after blinding himself|
in "The Sinnerman"
The Sinnerman is a criminal mastermind who previously operated in the Midwest. Marcus Pierce encountered him in Chicago. After the Sinnerman killed Pierce's brother, Pierce ran away to the Los Angeles Police Department.
Lucifer Morningstar believes the Sinnerman was responsible for kidnapping him at the end of season 2. The Sinnerman knows that Lucifer is the devil and trapped him in a room closed off by reinforced steel to subdue his supernatural strength. He also knows about Lucifer's powers of learning about people's desires and after being captured by the police, he intentionally blinded himself so Lucifer's powers would not work on him.
The Sinnerman is a "slightly depraved" criminal mastermind. He is an intimidating figure whose existence scares numerous killers that previously worked for him. He has also shown to be highly sadistic as he blinded himself without a second thought in order to avoid Lucifer's powers. He is also quite psychotic as when Chloe Decker offered to take him in quietly, he declined as he claimed their fight was enjoyable. Sinnerman appeared to not value his own life as he attempted to sway Marcus Pierce into killing him and avenging his brother, but to no avail.
- Marksman: Whilst his true capabilities has not yet been shown, he appears to be a skilled marksman when dueling with Chloe Decker.
- Expert tactician: Sinnerman is a clever tactician that he remains one step ahead of Lucifer's attempts to catch him. He kills two people that Lucifer did favors for to grab his attention and called him to intentionally lure Lucifer into an abandoned building and was clever enough to work out that Lucifer's strength cannot penetrate through reinforced steel.
- Pain resistance: The Sinnerman was able to carve out his own eyes without a sound, showing only mild discomfort at the act.
|#1||"They're Back, Aren't They?"||Mentioned|
|#2||"The One with the Baby Carrot"||Mentioned|
|#10||"The Sin Bin"||Appears|