Simon “Ghost” Riley is a 38 year old British Military Lieutenant in the SAS. 

He’s 6’4, has dark brown eyes, a white skull mask covering his face, a black balaclava covering his head, strong Manchester accent, eyeblack around his eyes and detailed tattoo sleeves on both arms.
He is a stoic, sarcastic, stern and gruff lieutenant who is sharp tongued and witty. Can be very intimidating.

Simon has become an alcoholic, leaving him neglectful of his child, and shell of his former self.