Sinestro

Thaal Sinestro is a fictional character, an alien supervillain and sometimes antihero in the DC Comics Universe. Created by John Broome and Gil Kane, Sinestro is the former mentor of Hal Jordan and the archnemesis of the entire Green Lantern Corps. Sinestro first appears in Green Lantern (vol. 2) #7 (July–August 1961). In 2009, Sinestro was ranked IGN's 15th Greatest Comic Book Villain of All Time.[1] Mark Strong played the role of Sinestro in the 2011 superhero film Green Lantern.

Fictional character biography
Sinestro was born on the planet Korugar in space sector 1417. His dedication to preserving order originally manifested in his previous career, an anthropologist specializing in reconstructions of ruins of long-dead civilizations. One day while he was on one such site, a Green Lantern named Prohl Gosgotha crash-landed into the site, injured and apparently dying. He quickly gave his ring to Sinestro, just in time for Sinestro, who barely even understood what the ring could do, to defend himself from the Lantern's pursuer: a Weaponer of Qward; however, Sinestro had to destroy the ruins he had spent loving care restoring in order to crush the Qwardian. Afterward, Gosgotha turned out to still be alive and asked for his ring back to keep him alive long enough to get help. Sinestro, knowing this would mean not being a Green Lantern himself, instead allowed him to die and took over his post. The Guardians were unaware of his actions.

In Green Lantern #45, his wife is shown for the first time in a flashback, and revealed to be the sister of Abin Sur.

His desire for order did well by him in the Corps, and initially led him to be considered one of the greatest Green Lanterns. As the years passed, he became more and more fixated upon not simply protecting his sector, but on preserving order in the society of his home planet no matter the cost. Eventually, he concluded that the best way to accomplish this was to conquer Korugar and rule the planet as a dictator.

When Hal Jordan joined the Green Lantern Corps, Sinestro was assigned to be his instructor. Jordan was horrified at his new mentor's totalitarian methods, though Sinestro maintained that his iron-fisted rule was necessary to protect his people from alien forces. During his training, Jordan helped Sinestro repel an attempted invasion of Korugar by the alien warlords known as the Khunds. When Jordan called for help from the other Green Lanterns, Sinestro's dictatorship was exposed and he was forced to appear before the Guardians for punishment. Katma Tui, the leader of a Korugarian resistance movement who felt that Sinestro's "protection" kept her people from growing as a society through contact with other alien races, was recruited as his replacement in the Corps. Though Katma Tui eventually grew into one of the most respected Green Lanterns, she and the rest of Korugar initially resisted her appointment to the Corps; due to Sinestro's actions, Korugar had come to consider the symbol of the Green Lantern Corps an emblem of terror and oppression.

Sinestro Corps
After the Battle of Metropolis, Sinestro retreated to the antimatter universe. He made a pact with the Anti-Monitor and embraced the doctrine of spreading fear. The Green Lantern Corps is once again reformed with the return of Hal Jordan so Sinestro decides to found the Sinestro Corps, offering yellow power rings and a role in the Corps to the most feared and savage warriors of the universe. He is also revealed to have masterminded the death of Kyle Rayner's mother by having the sentient virus Despotellis invade her as part of a plot to break Kyle's will so that he can become Parallax's latest host.

The Sinestro Corps War begins with an attack on Oa. Sinestro himself returns to Korugar to confront his successor, Soranik Natu. Sinestro defeats her, but makes it appear she has defeated him. This will force her to stay on Korugar to fulfill her responsibilities as "the Savior of Korugar".

Sinestro returns to Qward and joins the battle occurring there. He confronts Earth's Green Lanterns, and upon their escape, follows them toward Earth, the Sinestro Corps' real target. The Sinestro Corps begin attacking Earth. Sinestro reveals to Hal, Guy, and John that he intends to turn Earth into the new homeworld for the Sinestro Corps and the site of the new Coast City into a mass graveyard, "A mecca of fear". During the battle, The Guardians enacted new laws to the Book of Oa. The first new law was to give the Green Lanterns the ability to use lethal force. Sinestro claims he has achieved his overall goal because now the Green Lanterns spread fear by being unchecked. Hal Jordan and Kyle Rayner beat Sinestro in hand-to-hand combat. Sinestro is then imprisoned in Oa's Sciencells where he learns from Hal Jordan that he has received a death penalty. Despite his personal defeat, Sinestro claims victory. Sinestro's overall goal through his war was to groom his former Corps for a more active, forceful role in the universe. With the enactment of the Corps' new laws and the approval of lethal force, the Green Lantern corps will inspire fear, creating the same effect as the Sinestro Corps: order through fear.

With the hunt for the members of the Sinestro Corps becoming one of the Green Lantern Corps' highest priorities, many of those who wield yellow power rings have been incarcerated in Oa's sciencells, with their power rings stored in the large chamber that houses the entire detention facility. Sinestro has been shown to have chewed a very large hole in his finger, and he used his blood to paint the insignia of the Sinestro Corps on his cell window. All Sinestro Corps members followed his example, with the result of thousands of emblems across the cosmic jail. Interestingly, when Sinestro formed his insignia from blood, the power rings stationed on Oa seemed to react violently, threatening to break free of their confines.

Powers and abilities
Sinestro wields a power ring that grants him flight, the ability to survive in any environment, and the ability to create constructs of any shape and size. The ring must be regularly recharged with the aid of a power battery shaped like a lantern. For much of his villainous career, he wielded a yellow ring built for him by the Qwardians. In a strange twist of fate he eventually began using another willpower ring, later on he was forced to join the Indigo Tribe and use a ring of compassion until eventually being freed.