Being the pilot of the flagship "Serendipity" of the Minutemen (a ragtag group of free fighters) Cockswain Sinclair was left blind in one eye and was mildly paralyzed from the waist down after he was defeated in a long and straining dogfight. With the far advances of technology taking place Sinclair was administered a makeshift spinal cord made out of brass piping and a new prosthetic eye. He's a kind and courteous man with a sense of adventure and all of it's little treasures, which tends to be alcohol for the most part.
He continues flying to this today in search of the rouge who shot him down.