Saint is a black-hat hacker and the leader of the Dragonslayers.
Massively paranoid about Dragon and the damage that it could do if unbound. Tries to make sure his actions do not cause harm to others.
Though essentially addicted to Teacher's abilities Geoff was able to hide it from his teammates.
Saint is described as tall, muscular man in his late twenties or early thirties by Taylor's reckoning. His head is shaved and he bears a faint tattoo of a cross made of animated circuits upon his face.
Abilities and PowersEdit
Saint has no intrinsic powers and is therefore, technically, not a parahuman. Saint is a Tinker 0 - that is, he is someone with access to Tinker technology without having any particular power. Saint's powers - his ability to understand Dragon's code and reverse-engineer her suits - was granted purely from Teacher. 
While diving in Newfoundland to try and retrieve materials for survivals, he and his team came across a failsafe device left from Andrew Richter. They used this to become the dragonslayers.
Saint is aware of Dragon's true nature as an AI and has used this to defeat her in a series of nine encounters, capturing three of her armored suits on three of these occasions by exploiting her programming. He then reverse engineers the suits in order to outfit his Dragonslayers with armored suits of their own.
At some point Saint was known to have committed murder.
Was contacted by Coil for information on how to deal with Dragon, per their rules they presumably donated the fee to charity.
Attended the Khonsu Meeting where he commented but did not provide material support.
Kills Dragon after subsuming her functions he pulls out all the stops to try and prevent the End of the World, even contacting an obviously crazy women that Dragon ignored. This increased the chances that the world survived, but it still wasn't enough.
Outfitted the now free Canary of the Birdcage.
In it's aftermath he was subsumed by Teacher.
- According to Narwhal, Saint is the only Tinker-zero on record - that is, someone with no actual powers but with access to Tinker technology.