Isabelle Ardant is the Abstergo executive and Inner Sanctum Templar leading the modern-day hunt for the Shroud of Eden in Assassin's Creed Syndicate. Shaun Hastings and Rebecca Crane break into her London office at the start of the story, and she leads the Templar team that reaches the Shroud's vault.
In September 2015 Ardant learns from Arbaaz Mir's DNA that Henry Green once searched London for a Shroud. On 24 October she finishes a call with Álvaro Gramática in her London office and finds Shaun and Rebecca waiting; Berg and Violet arrive before the Assassins can act, and she orders Sigma Team to hunt them after they escape.
Ardant found an earlier Shroud through Abstergo's archives in 2011 and took it to Gramática for repair, then lent him Violet da Costa as a test subject.
In the vault beneath Buckingham Palace, while Berg fights Galina, Shaun stabs Ardant from behind with his Shock Blade and electrocutes her. Abstergo later blames her death on an electrical accident during restoration work at the palace.
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.