Simon Riley was born in Manchester, England to unnamed parents and a older brother named Tommy, who would often scare him when he slept. 1.6.3 The Search for Vladimir Makarov and Death.1.6.2 Infiltration of a Russian submarine base.1.6.1 Infiltration of the Russian Oil Rig and rescuing Prisoner 627.

In Call of Duty: Mobile, he is voiced by Jeff Leach, who voiced the character's 2019 reboot iteration. In Find Makarov, he was portrayed by Cameron Rufelds, and in Find Makarov: Operation Kingfish, he was portrayed by Kegan Wilson. He was voiced by Craig Fairbrass, who also voiced Gaz in Call of Duty 4: Modern Warfare, Wallcroft in Call of Duty: Modern Warfare 3, and Tee in Call of Duty: Infinite Warfare. He is the second-in-command of Task Force 141, and is seen wearing dark red sunglasses and a skull-patterned balaclava along with headphones with a mic.

Lieutenant Simon 'Ghost' Riley was a British special forces operator in Call of Duty: Modern Warfare 2 and the Call of Duty: Modern Warfare 2 graphic novel comic series Modern Warfare 2: Ghost. ~ Soap on Ghost, referencing Captain Price's line from Call of Duty 4: Modern Warfare.

Simon says call of duty