Bio in Brief:
Shortly after the Fall, the surviving JASON's regrouped. Once extinction was no longer looming imminent, the newly formed Argonauts began looking for ways to defend against future TITAN attacks and perhaps even one day fight back, and reclaim earth.
One such ultra-secret research project was known as Kronos, devoted to the study of the supremely advanced grey goo adaptive nanoswarms used by the TITANs. The result of project Kronos was an AGI dubbed 'Xeus.' used in an attempt to understand and model the swarm intelligence. For it's base, Xeus was created from a delta fork of the lead scientist on the project, Doctor Johan Creed, grafted onto a very dangerous bit of TITAN swarm programming.
The project was discovered and infiltrated by a Jovian spy who managed to sabotage and destroy the remote research habitat but not before the Xeus AGI was able to hide itself within a copy of the stolen data. When the spy returned to Liberty Station for debriefing, Xeus hacked the Jovian's computer network, crashing systems and causing a near fatal blackout, before escaping though a neutrino transmitter.
Upon arriving at Markov, Xeus was contacted by one of the Prometheans through the mesh, concerned that the AGI may have been infected by the TITAN tech in it's original facility. In the space of a nanosecond, Xeus was evaluated, informed of the existence of x-threats, and in effect was conscripted into Firewall as a Vector. The Promethean also took the liberty of making some edits to the program, modifying it's memories so as to remove any knowledge of it's own TITAN-tech origins, and indeed any inkling of Project Kronos. Xeus now believes he was born a human on Earth, fast-tracked his way through nano-sciences, signed on with JASON, and was later trained as a field operative by the Medean branch when he showed a promising talent for less academic pursuits as well. It also took the liberty of modifying Argonaut records to match up this information, and to all but bury Project Kronos, leading the Medeans to believe they merely reinstantiated one of their own, long lost from the Fall and recently recovered from an abandoned station in Earth orbit. The Promethean went so far as to recover the lost infugees (or perhaps was merely holding on to them) and edited their memories as well with false knowledge of Xeus. The cover is nearly flawless, although someone seriously looking for information on Project Kronos might be able to dig something up.
Currently Xeus has taken on the identity of Jon Tenet, a Scumborn hacker with known Reclaimer views. The AGI inhabits a custom Remade morph provided to it by the Medeans. Trading the uncanny valley trait for a level of unattractive (so human-looking, but scarred), the morph is outfitted with obvious cyberware, which both reinforces it's assumed identity, and hides the true capabilities of the morph (since people assume only the poor or scumborn would choose an unattractive morph, or use obvious cyberlimbs).
It's morph is equipped with a Ghostrider module currently occupied by an Alpha fork of itself.