3.Solidus Snake (MGS2)
From the early events of the Manhattan Incident it was made clear that Solidus, along with Ocelot, Olga Gurlukovich and the remaining members of Dead Cell had devised a plot to take over the Big Shell where rumours stated that a new and highly advanced battle station known as Arsenal Gear was being developed there. Calling themselves the Sons of Liberty, Solidus Snake assumed the identity of his presumed dead brother, Solid Snake, and kidnapped the current President James Johnson (The President originally aided Solidus of his own freewill).
It was believed that Solidus planned on using a nuclear warhead from Arsenal Gear to create a gigantic electro-magnetic-pulse over New York City, and attempt to reveal the existence of The Patriots to worldwide public scrutiny and topple there power of the business community in Manhattan. Solidus later revealed that he was in fact going to give Arsenal to Dead Cell after extracting the identity of The Patriots. Dead Cell were intended to draw the Patriots attentions whilst Solidus would hunt the 12 individuals down killing them off one by one. Solidus plan never came to fruition thanks to Ocelot, a Patriot spy, who had helped orchestrate the entire event (see S3 Plan for more information). Solidus was chosen to be involved because his relationship with Raiden resembled that of Solid Snake and Big Boss.
When Arsenal Gear crashed into Manhattan, Solidus and Raiden were thrown from the top of Arsenal onto the roof top of Federal Hall, where Solidus told Raiden his true intents and desires. Solidus, unable to father children and pass on his legacy, wished to be immortalized by history, but knowing The Patriots indomitable control of information they wouldn't allow this. He explained his reason for the Big Shell takeover and his plan to kill off The Patriots, finishing off by declaring that only one monstrosity will have the privilege to live on. Solidus and Raiden clashed swords in a duel that would ultimately result in Solidus' death, falling from the rooftops of Federal Hall with his spine severed.
2.The Boss (MGS3)
In 1964, The Boss was then ordered to take part in a major operation to recover the Philosophers' Legacy from Colonel Volgin - known as the Virtuous Mission. In order to acquire the Legacy, The Boss had to trade her way into Volgin's ranks - and to do so she was given two portable nuclear warheads, one of which was ultimately used by Volgin to destroy Sokolov's design bureau. However, with the destruction of the bureau, The Boss' mission was greatly expanded and revised - this time she would have to also help prove the innocence of the United States in a mission known as Operation Snake Eater. One week after the Virtuous Mission, the U.S. government sends in an operative with orders to assassinate The Boss. The man who must carry out those orders is Naked Snake - The Boss' beloved protege.
Understanding the fact that in order to save the world and her country she had to give her life, The Boss gradually helps Snake with his mission while at the same time keeping up Volgin's trust.Ultimately, The Boss informs Snake about the Philosophers and tells him that as a soldier it's his duty to face an existence of endless battle.
After a final battle between the two amidst a field of white flowers, Snake defeats his mentor and kills her with a single shot from her own weapon. In the end, it was the ultimate goal of The Boss to use the Philosophers' Legacy to unite the Philosophers back together and in turn the people of the world. However, despite being seen as a traitor by both the United States and the Soviet Union, she would always be seen as a hero and a patriot by her disciple - Big Boss.
1.Psycho Mantis (MGS1)
While on Shadow Moses Island, Psycho Mantis attempted to read Donald Anderson's and Kenneth Baker's minds. When Revolver Ocelot accidentally killed Anderson during a torture session, Mantis came up with the idea of tricking Solid Snake into getting the PAL Key from Baker and using the keys to activate Metal Gear REX while making Snake think he was de-activating REX. They made Decoy Octopus disguise himself as Anderson to talk Snake into the act.As Snake and Meryl Silverburgh made their way through the island, Psycho Mantis managed to control Meryl's mind. He turned her against Snake and tried to make her shoot him, though Snake was able to knock her unconscious. Psycho Mantis then revealed himself and fought Snake himself. On the edge of defeat, Mantis decided to awake Meryl and try to make her shoot herself in the head. However, Snake managed to both prevent Meryl from killing herself and defeat Psycho Mantis.
Upon his defeat, Psycho Mantis reveals Snake's and Meryl's future, telling them to continue onto the communications tower and reveals a hidden doorway in the room he fought Snake in. As Psycho Mantis tells them he can read people's minds, Snake takes off his mask. He reveals that all the minds he read contained the same thought – to pass on their DNA. He also says that humans are fated to bring each other pain and reveals he killed his father and burned his village to bury his past.Psycho Mantis goes on to say he and Snake are similar, that he never agreed with Liquid's revolution, and that he just wanted to mindlessly kill people. However, he then says that Snake is worse than Liquid himself. He reveals that he read Meryl's mind and that Snake has a large place in her heart, though he does not know if their futures lie together.
He then asks Snake to put his mask back on to prevent people's thoughts from forcing their way into his mind. He then opens the secret passageway and says that that is the first time in his life he has helped people, and that it feels nice. He then died, and Snake and Meryl continue to the communications tower.