Jeff the Killer (Architectverse)

Jeff the Killer is a recurring antagonist in the Slenderverse.

-Jeff Woods-
In the prequel spin-off series, he is the protagonist and later main antagonist. In the first videos, he moved to a unknown place and left his channel's password to his friend Logan. While walking with his cousin-brother Liu, he was ambushed by Randy, Keith & Troy. Liu was stabbed in the leg, leading to Jeff almost killing the three boys with the same knife they used to stab Liu. His camera was damaged and died during the fight, after the fight, neighborns said to the police that Jeff started the fight which was a lie, Jeff was later sent to the court. The Pawns tell him that he is one of the Marked Ones, along with Alex Henderson, Edward Davis and Gabriel Holden.

SirensInTheNight
He is the main antagonist of the series under the nameChess. He has a connection to the Blue Masks and also a great insterest in the series' protagonist Edward. He seems to be more friendly compared to his rival, Eyeless Jack, who is also stalking Edward.

The North Woods Project (Alex Henderson)
Jeff is a major character in the series, he shows the main character finding a note written by the Sentience in his house, with the message "TURN AROUND" written on the back. After being tortured, teleported, and otherwise beaten across several different places by the Slender Man, Jeff falls to the ground, screaming, and is dragged away, in which the video ends. He later reappears when Alex gets a phone call from him, but he mysteriously appears in Alex's room, he tells that he is seeing The Archangel outside his house. He is later kidnapped by the Sentience and scarred with a glasgow smile.

The Mayhem Theory
Jeff is a side character in the series, as he mentions Gabriel Holden in one of his videos on -Jeff Woods-.