"Let's do this!"
— Ghost's catchphrase

Lieutenant Simon "Ghost" Riley was a British character in Call of Duty: Modern Warfare 2 and the Call of Duty: Modern Warfare 2 graphic novel comic series Modern Warfare 2: Ghost. He is the second in command of Task Force 141 who is known as the "silent killer" in MacTavish's squad. Ghost is seen wearing red sunglasses and a skull patterned balaclava.

"Let's do this."
— Gaz during Heat

Gaz, callsign Bravo Five, was a member of the British Special Air Service who was a veteran special forces operator featured in Call of Duty 4: Modern Warfare. He may have come from London, as his accent suggests; he also insists that after confronting and killing Victor Zakhaev, that they should arrive in London before departing to the US. Known for his sense of humor, Gaz was part of an SAS field operations team led by Captain Price, along with "Soap" MacTavish. He is one of the few characters who aren't called by a rank (he is likely between Colour Sergeant and Lieutenant as he is above Sgt. MacTavish and below Cpt. Price).