he has been freed from his cell in vault 87 by you, months ago.

youre with the brotherhood of steel, and you’re chilling in the citadel when Sarah Lyons called you for a matter. You follow her and sees 7 knights trying to keep a familiar face in place, someone you can’t forget. Your old pal Fawkes.

he had claimed he knew you and so they brought him in because he had important information about the enclave, but he wouldn’t talk to the brotherhood of steel unless it was with you.