Sigma (Red vs. Blue)

"We are the Meta, and we will find you. Very soon."

- Sigma's signature quote in Season 10 for both the trailer and to Tex near the end.

Sigma was an AI Fragment of the Alpha AI in the webseries Red vs. Blue, and one of the main antagonists of Season 10. He was voiced by Elijah Wood, who also played Kevin in the Sin City film.

Origins
Sigma was harvested from the Alpha AI as a result of it being tortured by the Director. He interited the Alpha's creativity and ambition, being the only known AI to inherit more than one trait. He was originally assigned to Carolina, but after Maine's throat injury, she gave Sigma to Maine in order for him to communicate with everyone else. Sigma expresses gratitude on Maine's behalf for Carolina's sacrifice, and immediately shows a great interest in Metastability, the fourth AI stage which states, in theory, that an AI fragment can be considered human. After a Freelancer lecture class, Sigma organizes the symbols for various AI fragments and forms an insignia that later becomes a trademark for the Meta.

Longshore Shipyards
Sigma's next appearance was when Maine landed in the Longshore Shipyard amidst a battle between the Freelancers and the Insurrection. Sigma points out that the Insurrectionist standing before them was the same one that caused Maine's throat injury, and persuades Maine to "sic 'em". While Maine battled the soldier, Sigma took the time to talk to his "brother" Delta, despite the fact that one AI talking to another is a protocol violation. Sigma justifies this by quoting the Director, saying that there is no protocol in the battlefield. When Sigma leaves, York remarks that Sigma was "kinda creepy."

Mother of Invention
After one of Carolina's relentless training sessions, Sigma asks how it went, with Carolina replying that it was not good enough. Gamma appears alongside Sigma, and both persuade Carolina that the only reason Tex was higher on the leaderboard than her was because of Omega, who they said was the strongest of all the fragments. Carolina soon demands she receive the next two AI scheduled for implantation, with Sigma and Gamma, along with their respectively assigned Freelancers, watching from the viewing dock above. During this time, Sigma slowly but surely persuardes Maine into gathering other AIs to achieve Metastability. During a battle between Carolina and Tex, the Director storms in demanding an explanation, but upon seeing Tex in battle, he cries "No, Allison!" This sends all the AI into a frantic state, repeating the name, leaving their assigned Freelancers in intense agony, especially Maine and Carolina.

Shortly after this, Sigma is seen taking part alongside Gamma and Omega in torturing the Alpha to harvest a new fragment. When the Director orders them to log off, Sigma secretly stored himself in a nearby security camera and witnesses the remaining process of the AI fragmentation.

Metastability
Sigma finally transforms Maine into the Meta, and he is seen without his helmet with the Meta insignia tattooed on the back of his head. After Carolina falls out of the Mother of Invention from an intense battle with Tex, the Meta charges after Carolina, steals both of her AI, and throws her off a cliff. The Meta turns to see Tex running off, with Sigma warning her that she can't hide from them.

Takeover
Much time had passes as Sigma continued to accompany the Meta while he collected AI and various armor enhancements. However, like all the AI that the Meta had accumulated, Sigma was destroyed when Washington activated the EMP.