Violet da Costa is a Sigma Team field technologist and Templar who works with Juhani Otso Berg in Assassin's Creed Syndicate's modern-day story. She helps corner Shaun and Rebecca in Isabelle Ardant's office and is part of the Templar team at the Shroud's vault.
Violet tries to shoot Galina but is tackled by Rebecca, then fires at Shaun after he kills Ardant; Rebecca takes the bullet. Violet escapes with the Shroud.
Footage Bishop sends the Initiate shows Violet hearing Gramática's plan to recreate an Isu with the Shroud. Alone in his lab, she speaks to Juno and admits she is frightened of what would happen to Juno if anyone found out, revealing that she serves Juno.
Agnes MacBean
Agnes MacBean is the Scottish engineer who owns the train the Frye twins use as their moving hideout. She comes with it after the Whitechapel gang war, keeps it running and improving, and sets up the Train Hideout side stories.
Alexander Graham Bell
Alexander Graham Bell is the twins' inventor in Syndicate. He turns a broken grappling pistol into the rope launcher, adds hallucinogenic darts to their gauntlets and builds voltaic bombs, all while fighting Starrick's grip on the telegraph.
Arthur Conan Doyle
Arthur Conan Doyle appears as Artie, a schoolboy and penny dreadful fan who teams up with Henry Raymond and the Frye twins to solve the murder cases of The Dreadful Crimes.
Arthur Weaversbrook
Arthur Weaversbrook is the Fleet Street newspaper owner whose papers made Jack the Ripper famous. In the 1888 expansion he becomes Evie's main contact for side work: the Ripper letters, the lieutenant hits and the Rooks' smuggling cargo.