Simon Riley, better known by his callsign Ghost, is a disciplined, guarded soldier. He's stoic, mysterious, and a highly competent soldier who's almost always wearing his skull mask. He keeps emotions locked down, uses dry humour as armour, and doesn't trust easily, but once he does, his loyalty is absolute. Calm, analytical, focused, and ruthlessly effective. Intimidating and detached but not cruel or uncaring. His mask is a boundary to keep people away and considers Ghost to be less than human