The Patriots' double (and sometimes, triple) agent, Revolver Ocelot
He is a triple agent playing the Patriots, the Soviets, and everyone else in between. The only person he ACTUALLY respects is Big Boss, for several reasons, from his choice of firearms to the infamous torture event.
You gotta love Ocelot for being a sneaky little shit. For that, we got to respect and admire him.
According to declassified records, Ocelot, birth name Adamska, was born during the invasion of Normandy on June 6, 1944. He is the son of the legendary members of the Cobra Unit, The Joy and The Sorrow. His mother was wounded during childbirth in the middle of the battlefield, forcing her to give birth via cesarean section and the resulting operation gave her a snake-shaped wound on her torso. Shortly after birth, Ocelot was taken from his birth parents by agents of The Philosophers. He served under command of Yevgeny Borisovitch Volgin of the GRU, but was secretly a sleeper agent of both the KGB and the CIA, rooted in the American branch of The Philosophers. Because of his heritage, he was given preferential treatment as a Spetsnaz agent and was even promoted Major of his Ocelot Unit.
During Operation Snake Eater, Ocelot worked as a triple agent: He was at first an agent of The Philosophers, sent to Russia to infiltrate Colonel Volgin' army and steal The Philosophers’ Legacy for America. He was then asked by the DCI to pose as an ex-NSA code-breaker code-named ADAM, and aid Naked Snake in his mission to destroy The Cobras, destroy the Shagohod and kill The Boss, while also trying to get the Philosophers' Legacy for the American branch of The Philosophers. However, before Ocelot turned up to meet Snake, a Chinese Spy posing as EVA pretended to aid Snake in his mission while secretly plotting to take the Philosopher's Legacy for the Chinese government, so Ocelot decided to keep his identity as ADAM a secret and aid Snake subtly and secretly. Throughout the mission Ocelot and Snake have a brotherly rivalry and fight on several occasions. During the fight Snake has with Volgin, Volgin orders Ocelot to shoot Snake, but Ocelot refuses, hinting at his triple-crossing before it is fully revealed, and also alluding to the idea that Ocelot looks up to Naked Snake. At the end of the game, a secret conversation between Ocelot and the DCI reveals that the American branch of the Philosophers have only acquired half of the Legacy, and Ocelot falsely informs the DCI that the KGB has the other half. In actuality, Ocelot and his unknown benefactor secretly hold the other half of the Legacy, waiting until the time is right to use it.
Early in his career, Ocelot witnessed Colonel Volgin brutally torturing Naked Snake after he is discovered during his infiltration of Groznyj Grad. Though Ocelot was initially opposed to the practice, he later praised the effectiveness of torture, calling it "the ultimate form of expression." Ocelot started to research it after Operation Snake Eater, eventually becoming an expert in the field.
In the 1970s, during the San Hieronymo incident, Ocelot had become dissatisfied with the Philosophers bickering, which had pitted the CIA against the Pentagon for control of the Legacy. Ocelot eventually decided to assassinate the DCI and take control of the entire Legacy himself. From this, he hoped to hand the country over to "The Patriots", which will be founded from the Legacy. Ocelot broke his ties to the unknown benefactor, whom Gene refers to as "the Man with the same codename as Null," until this mysterious man introduced Les Enfants Terribles to him. Ocelot was intrigued and agreed to allow this man to join him in the Patriots, as long as Big Boss was allowed to join as well. Ocelot's request came true when the unknown benefactor, Major Zero, along with Ocelot, Big Boss, Sigint, Para-Medic, and eventually EVA form The Patriots. Their dream was to shape the world into one which The Boss envisioned, although Zero's vision greatly differed from Big Boss', which would eventually lead to their downfall.
Eventually, Big Boss' ideals grew differently from Zero's, and the two started to feud. Big Boss, who was raised to a being of Christ-like reverence after the formation of the group, resented being treated as a puppet for The Patriots own personal goals, and left the group to form the military nation Outer Heaven. However, unbeknownst to Boss, Para-Medic, now known under her real name of Dr. Clark, had retrieved a sample of Boss' DNA while he was in a coma, and The Patriots began work on developing a clone of Big Boss in order to keep their dream of him as a messiah alive. If Big Boss himself wouldn't ally with them, they thought, then they could clone him to keep him forever on their side. EVA and Ocelot were none too pleased with this development, nor was Big Boss, who eventually found out this information for himself, possibly through Ocelot and EVA. He refused to look at either of the Twin Snakes as sons, yet much later in his life would remark that he respected at least one of the sons, Solid Snake, as a soldier and as a man.
Sometime during his career in the Soviet military, he met Sergei Gurlukovich and Vulcan Raven, both members of the Spetznas unit as well. After the fall of the Soviet Union, Ocelot stayed in western Europe, continuing life as a spy and agent of the newly formed Patriots. While Gurlukovich began to create his own mercenary army, Ocelot suggested to Vulcan Raven that he join the mercenary nation Outer Heaven, which he did. Ocelot left Spetsnaz and joined the OMON and later the SVR but grew tired with both regimes and eventually withdrew.
After Solid Snake had incinerated Big Boss during the Zanzibar Land Uprising, Major Zero retrieved his burnt body, somehow clinging onto life, and injected him with nanomachines that would regenerate his body and keep him in a permanent stasis, preserving him forever as The Patriots' messiah. This infuriated Ocelot and EVA, and as a result they both left The Patriots, although Ocelot did so in secret, in order to still operate as a spy and maintain their trust. EVA and Ocelot plotted to recover Big Boss' body from the clutches of Zero, a plan which would never fully be realized until 2014.
He then cut a swath through the world's hot spots as a spy and mercenary up until the early 2000s, when he discovered that FOXHOUND was now being commanded by one of Big Boss' sons, Liquid Snake, and he was placed in the FOXHOUND unit at the request of the Patriots. Having held Big Boss in such high regard in his earlier years, he was more than willing to fight under one of his sons. Ocelot also coerced his old comrade Vulcan Raven to join FOXHOUND during this time. While in FOXHOUND, Ocelot secretly provided President George Sears, the third Snake, with information regarding the dissension of Liquid Snake.
Ocelot took part in the takeover of Shadow Moses, along with his FOXHOUND colleagues. He was ordered by George Sears to convince Liquid into taking over Shadow Moses with the GENOME Army and using Metal Gear REX's nuclear missile launching capabilities to threaten America into handing over the remains of Big Boss along with one billion dollars, in order to correct mutations in the GENOME Army, thus creating an army of super-soldiers. Liquid believed he was carrying on Big Boss' legacy, even telling Ocelot to refer to Shadow Moses as "Outer Heaven." Ocelot, being the master of torture that he was, was given the task of interrogating the DARPA Chief Donald Anderson, also known as Sigint, Ocelot's former Patriots comrade, and the President of ArmsTech Kenneth Baker in order to get the launch codes so that FOXHOUND could launch a nuclear missile from REX.
Unknown to Liquid and in an effort to cleanse the world of The Patriots and rescue Big Boss, Ocelot killed Donald Anderson (aka Sigint) in a purposefully botched interrogation. He then gave Psycho Mantis the idea of tricking Solid Snake into using the PAL keys that Baker gave to Meryl Silverburgh to inadvertently activate REX. Shortly after Ocelot got Baker's launch code, he tied Baker to a pillar and connected the strings to C4. Then, when Solid Snake attempted to rescue Baker, Ocelot challenged Snake to a gun-duel. Snake eventually defeated him, and as Ocelot went to deliver a surprise shot, Gray Fox appeared and cut off Ocelot's right hand. Ocelot then attempted to spin his gun in his left hand, dropping it. Picking up his gun, Ocelot then ran off, swearing revenge. Later on, when Snake was captured by Sniper Wolf, she took Snake to the prison holds in the second basement of the main Tank Hangar. While he was there Ocelot tortured Snake into telling him what Kenneth Baker told him about the PAL Key. He also tortured Meryl, to what capacity is unknown. He was then seen towards the end of the mission talking to Liquid about their plans, before spotting Solid Snake and alerting Liquid to his presence. Ocelot then disappeared once again..