During the original MW2, Soap is higher-ranking than Ghost; being his Captain, while Ghost is his Lieutenant and second-in-command. In MWII, Ghost keeps his rank of Lieutenant, however Soap is lower-rank, being a Sergeant. Ghost affectionately refers to Soap as Johnny,  especially after Alone .

Knig is an Operator of the KorTac faction featured in Call of Duty: Modern Warfare II, Call of Duty: Modern Warfare III and Call of Duty: Warzone 2.0. Knig suffered from severe social anxiety throughout his life, often being bullied during his childhood.