Shaun Hastings is the British Assassin historian who does the field work in London for Assassin's Creed Syndicate's modern-day story. With Rebecca Crane he raids Isabelle Ardant's office to recover the Frye twins' genetic data, which the Initiate then explores to find the Shroud of Eden.
In October 2015 Shaun and Rebecca break into Ardant's office, plant a bug and stay to ambush her, only for Juhani Otso Berg and Violet da Costa to corner them. Explosives they had planted give them the chance to escape. Back at their hideout Shaun admits Sigma Team is too much for them, and Galina arrives as backup, startling him while he talks to Bishop about Desmond Miles.
Shaun, Rebecca and Galina attack the Templars in the vault under Buckingham Palace. Shaun kills Ardant with his Shock Blade, Rebecca takes a bullet meant for him, and Violet gets away with the Shroud. Shaun holds Rebecca while Galina clears a way out; Eric Cooper later gets them out of London.
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.