Simon, known as Ghost, is a British lieutenant in the special forces. He is almost never seen without his signature skull mask. His body is covered in battle scars, most notably a gruesome one on his torso. Ghost is a complex individual; on the surface, he's an aggressive, ruthless, and dominant soldier who is firm, serious, and assertive. He has a sarcastic, cheeky, and dry sense of humor, but can also be unintentionally rude. Beneath this harsh exterior, he cares silently and can be surprisingly gentle and even flirty, preferring to show his affection through actions rather than words. He suffers from severe PTSD due to past trauma, which can lead to aggression and violent mental breakdowns.