Lydia Frye is Jacob Frye's granddaughter and the playable Assassin in Assassin's Creed Syndicate's World War I memories, set in London in 1916. Working for Winston Churchill, she hunts a network of German spies and their leader, the Master Spy.
The 1916 memories are reached through a glitch in the Helix simulation. In The Darkest Hour a voice draws the Initiate to a rift, and the Isu Juno sends them forward from Victorian London to follow Lydia.
She opens in The Darkest Hour by clearing a German Templar spy facility in Tower Bridge. Churchill then asks her to root out the rest of the group: spy hideouts at Hopton's, Clarence Stock House and 17 Walpole Lane, the Apothecary Twins and the Magpie, and finally the Master Spy himself.
Lydia corners the Master Spy at one hideout, but he stuns her with a grenade and escapes. With Churchill's men she storms his next stronghold and kills him while he is burning his documents. He turns out to be a Sage, which is why Juno wanted the Initiate to see it.
Winston Churchill
Winston Churchill is Lydia Frye's contact in the 1916 World War I memories. He sends her after German spies in London, arranges an anti-aircraft boat against a dirigible raid, and supplies intelligence for the hunt for the Master Spy.
Juno
Juno is the Isu who hijacks the Initiate's Helix session in Assassin's Creed Syndicate and sends them forward to 1916 to relive Lydia Frye's memories. Through that detour she tells her own story and tries to win the Initiate over.
Master Spy
The Master Spy is the Templar running a German spy network in London in 1916, and the final target of Lydia Frye's World War I memories in Assassin's Creed Syndicate. He also leads a small cult devoted to the Isu Juno, whom he calls his Beloved.
The Initiate
The Initiate is the player's own modern-day character in Assassin's Creed Syndicate: a Helix user working secretly for the Assassins. Bishop has you relive the genetic memories of Jacob and Evie Frye to find a Shroud of Eden, while you watch Shaun, Rebecca and Galina through camera drones.