Description
Legion is a Geth that actually protected Commander Shepard during a mission to collect a Reaper IFF. He was deactivated during the mission, and Shepard re-activated him to discover that he was friendly. ... Legion is actually a member of a sect of the Geth that is not aggressive to all beings.
When the geth does not appear to be hostile, it expresses its wish to help Shepard's mission, at which point it will join Shepard's team. When Shepard asks the geth its name, it simply states "Geth". Not satisfied, the Commander rephrases the question until EDI steps in and, referring to the number of programs active in the single mobile platform, quotes a passage from Mark 5:9 in the New Testament — "My name is Legion: for we are many". The geth accepts this to be an "appropriate metaphor" and is henceforth known as Legion.
Legion speaks in a straightforward and laconic fashion, often answering with single words. When it uses whole sentences, their word structure is very organized. Legion regards itself not as a single being, but as a gestalt entity which must achieve consensus to act. Legion expresses admiration for EDI, because unlike the geth, who are made up of different processes that rely on each other, EDI handles all the functions on the Normandy by herself, though Legion also questions how she manages to maintain stability. Legion occasionally expresses its disapproval of how EDI's activities and development are shackled aboard the Normandy.
Aboard the Normandy, Legion provides intelligence on how the Reapers exercise control over its people. It mentions that by accepting Reaper aid, the geth have become upgraded. While geth normally operate strictly off codes or programs, the reaper virus allows their thought processes to become more "organic" in nature, giving them the possibility of true consciousness. The geth find it "beautiful", indicative of life, and will die for it. Legion reports that while the organics have destroyed the long range control signal, there is still a short-range backup being deployed somewhere on Rannoch. It devotes most of its time searching for its whereabouts inside the War Room.If Shepard asks, Legion reveals details about its activities. After the suicide run on the Collector base, Legion returned to the consensus. Data gathered during its time with Shepard confirmed that the Old Machines' return was imminent, and geth planned for war. Shepard asks if the other geth believed Legion's proof, and dryly comments it must've been nice when Legion says they did.
On the subject of what interfacing with a Reaper feels like, Legion describes that even with the Reapers' total control the geth still could not comprehend them. Legion does not view the Old Machines as deities, but the experience has given it perspective on why others imbue them with godlike qualities.
Eventually, the location of the elusive Reaper base is made known. En route to the place, Legion reveals that it still carries remnants of the Old Machine code. Whatever Shepard's reaction, the geth states that it did not intend to cause offense. Legion uses its upgrades to break any geth security during the mission and eventually acquires an escape vehicle that Shepard and company use after learning that the short-range "signal booster" is an actual Reaper.
Shepard is at a momentous crossroads: one wrong move will doom one or both great races. Depending on how Shepard handles the situation, the geth may or may not eliminate a majority of the quarian forces after being upgraded with the Reaper tech; achieving their own consciousness will provoke them to retaliate against the attacks from their creators, as they will be more concerned to preserve themselves than ever before. Shepard has the power to prevent Legion from uploading the upgrades, allow Legion to upload them, or persuade the fleet to stand down and allow Legion the upload.
If Legion is allowed to upload the upgrades from the start or Shepard withdraws their decision to let the geth die, it begins uploading. Tali gives the order for all ships to stand down, but Han'Gerrel belays the order, and firing continues. Tali begs Legion not to continue, but it continues regardless, admitting that it regrets the deaths of the quarians but sees no alternative. It soon finds out that copying the code is insufficient; direct personality dissemination is required. Legion must disperse itself to the geth consensus, thanking the Commander for the opportunity to do so while apologising that there is no other way before deactivating. Legion refers to itself as "I", not "we", signifying that it became a true individual rather than a gestalt intellect. If the quarian fleet did not cease fire, the newly-alive geth destroys the majority of the fleet, and with it, most of the quarian race.
A Geth Prime acting as an emissary later trudges up to Shepard. The Prime, now referring to itself as "I" as well, states that it will honor Legion's promise to help in the Reaper war. Shepard asks if Legion is still around but the Prime confirms that it is dead.
(Mass Effect 2)
(Mass Effect 3)
After being revived from death and having to join a pro-human organization without a choice, Commander Shepard must assemble a team, battle a new threat, and make tough choices in order to save the galaxy from total annihilation once more.
Following the conclusion of the first Mass Effect, Shepard and his ship, the Normandy, are dispatched to wipe out any further geth resistance. During the patrol in space, the Normandy is attacked by an unknown ship. Most of the crew escapes the Normandy, but Shepard is killed. Fortunately, Shepard's body is retrieved and is revived by Cerberus, a pro-human organization that is at odds with the Alliance, whom Shepard was a part of. Two years later, Shepard learns from the Illusive Man, the leader of Cerberus, that numerous human colonies are vanishing, but the latter does not know why. After Shepard visits a colony that was recently attacked by these unknown belligerents, he learns that the belligerents are in fact Collectors, the same species that was behind the downing of the Normandy. Attacking the Collectors home world would be suicide. In response to this growing threat posed by the Collectors, Shepard creates a team made up of former squad members from the first Mass Effect was ...
Earth is under attack by a monstrous race of gigantic living ships known as the Reapers. Even if Commander Shepard could unite all surviving species in the galaxy, only a miracle could save them. Then again, Shepard did come back from the dead.