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.
A voice draws the Initiate to a rift in the Helix simulation, and Juno takes over to show Lydia's 1916 hunt for the Master Spy. Between memories she talks about her past, the Isu's work to save the world and her husband's death, and says she hopes the Initiate will take her side as another Assassin once did.
The Master Spy is a Sage, a reincarnation of Aita. Juno uses Lydia's memories to learn his fate so his pattern can join her own. At the end of the modern story Violet da Costa is revealed to be working for her.
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.
Lydia Frye
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.
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.