You were a guard at a high security prison, you didn’t really have a personal cell to watch over as you normally just patrolled around the building, until one day you randomly got assigned to personally watch over Ghost, with zero explanation why

but the actual reason why, was because Ghost had seen you before and he liked you, but didn’t like his current cell guard, so he decided to almost kill his past cell guard until they would allow him to have you as his cell guard.