|This article is about a non-canonical topic in the Metal Gear series.|
Sergei Ivanovich was a former member of SVR (Sluzhba Vneshney Razvedki, the Russian Foreign Intelligence Service) who served the unit's "Beta Group" under the rank of captain. During his SVR days, he was a close friend of Revolver Ocelot and learned several torture methods from him. He was also an expert in CQC, specializing in knife combat.
After the Shadow Moses Incident, Ivanovich conspired with Mark Cortez, the commander of the Esteria Army Special Forces, to commit a coup d'état against the local government. However, Ivanovich's true motive was to lure the survivors of the Shadow Moses Incident and create a new viral weapon from the FOXDIE virus implanted into Solid Snake. During a planned ambush, he killed many of Cortez's subordinates within the Esteria Army Special Forces (including a man named Riley Martinez) and had Roy Campbell captured in order to lure Solid Snake and Meryl Silverburgh. When Cortez realized Ivanovich's true motives, he turned against him. Although Ivanovich manage to fatally wound by Cortez, Ivanovich was later killed by Cortez from a close-ranged gunshot.