While talking with Lord Shaxx, Cayde-6 disputed the Crucible handler's assertion that former Titan Vanguard Saint-14 was dead.
He praised the Exo's ability to kill Fallen Kells but noted that Saint was also crazy.
"Cayde is a cunning hunter, with years of experience in staying alive in the wilds. I'm not sure the 'shoot them all to death' strategy is going to be enough." Like most Exo, Cayde remembers little about his past before the Collapse.
However, he remembers enough to provide substantial information, albeit he admits the order is out of sync.
Shaxx then left to watch the Crucible debut the new Guardian from Old Russia, who Cayde joked could be the savior Saint had forseen and that they could call them "Crota's End".
Cayde later learned that that Guardian had ventured into the Ishtar Collective on Venus and gathered information on Vex Gate Lord's as part of a deal with the Awoken in the Reef to gain access to the Black Garden.
The Hive pursued him to the surface, and Cayde cut down many Thrall before running out of ammo for his machine gun.
He was found with a journal containing Ace's name on his person after being revived by his Ghost, and that Cayde kept writing to him despite not remembering him and that his son was long dead.
The Baron then tossed her last Shock Pistol to Cayde, but when he went to grab it she attempted to stab him.
However, she was slow and Cayde easily dodged her, and he proceeded to break her arms and slit her throat.
Cayde used to be a human soldier with a large debt over his head, when he was approached by Clovis Bray to have his debt removed.
The job offer itself isn't explicitly stated, but what Cayde remembers next is coming to Europa where he was converted into an Exo.