The mind of Liquid Snake, housed in the body of Revolver Ocelot. Balance was restored to his psyche after the right hand that housed Liquid Snake's will was surgically replaced as a prosthetic limb. He ran Outer Heaven, a mother company that secretly controlled the world's five largest PMCs (Private Military Companies), and plotted to lead a rebellion against the Patriots using its military power.
Using Big Boss's genetic code to enter the Patriots' AI network, Liquid Ocelot succeeded in taking over the Songs of the Patriots. Renaming it the Guns of the Patriots, he used it to disable every gun and weapon in the world. He then stole the Arsenal Gear-class battleship from the Patriots, and outfitted it with Metal Gear REX's rail gun. He then attempted to use a nuclear warhead launched into orbit from the rail gun to destroy the Patriots' core AI, "JD", in space.
Revolver Ocelot played the part of Liquid Ocelot in order to awaken Big Boss, who had been kept in a comatose state by the Patriots' AI collective, to find the whereabouts of Zero. He posed as a Liquid Snake doppelganger in order to hide those intentions from the core AI, JD.
Once he had destroyed JD from the inside, his mission as Liquid Ocelot was over. When his life was subsequently claimed by FOXDIE, he died as Revolver Ocelot himself.