Nebula

"After Xandar, you're going to kill my father?" "You dare to oppose me?" "You see what he has turned me into? You kill him and I will help you destroy a thousand planets."

- Nebula and Ronan the Accuser

Nebula is a Luphomoid assassin and an adopted daughter of the intergalactic warlord, Thanos. She is also the adopted sister of Gamora. She served as the right-hand woman of Ronan the Accurser during his and Thanos' quest to retrieve the orb.

Early Life
Raised in the service of the interplanetary warlord, Thanos, Nebula trained to be a Galaxy-Class Killer under the tutelage of Ronan the Accuser. Nebula would often train alongside fellow Thanos devotee Gamora and Korath.

One training scenario on the arboreal world of Dervani saw Nebula and Gamora pitched against each other in a competition to retrieve a data ingot for Ronan. The girls sparred on the surface, leading to Gamora throwing Nebula of a cliff, severely injuring her and requiring multiple cybernetic replacements.

Upon reaching adulthood, Nebula and Gamora served Thanos under the command of Korath the Pursuer. On a mission to locate the Orb on the planet Praxius IX, inside of one of the Cloud Tombs of Praxius, Nebula went in without waiting for Gamora and fell into a trap. Ensnared by an impenetrable Laser Thorn Energy Net, Nebula found herself at the mercy of the inhabitants and needed to be rescued by Gamora.

Never one to tolerate failure, Thanos ordered Gamora to leave Nebula behind, with only a sharp blade to free herself. Nebula was forced to amputate her own arm in order to escape the netting.

Quest for the Orb
Thanos lent Nebula and Gamora to Ronan the Accuser, who made a deal with Thanos to retrieve the Orb for him so he would in turn destroy Xandar. When Korath returned and reported that he had failed to retrieve the Orb on Morag, thanks to Star-Lord's intervention, Nebula was tasked to retrieve the orb from Xandar. Nebula told him it would be an honour but Gamora insisted she follow Quill as she knew Xandar. Ronan agreed and Gamora went on the mission. When they left the meeting, Nebula confronted Gamora and they had a brief argument where they tried to break each others fingers. When Ronan and Nebula recieved word that Gamora had been planning on betraying Ronan and Thanos only to be arrested and sent to the Kyln with the Orb, The Other called Nebula and Ronan to the Sanctuary to discuss this turn of events with Thanos. There Nebula began repairing her cybernetic arm while Ronan argued with The Other, only for Ronan to kill Thanos' servant by snapping his neck. Thanos responded by insulting and threatening to kill Ronan if he failed again which Nebula agreed with. As they left Nebula assured Ronan that he would not win a fight with her father. Afterwards they both headed for the Kyln. When they arrived at the Kyln they discovered Gamora had already escaped with the Orb, with the help of Star-Lord and others. Ronan's soldiers took over the prison and Nebula tortured a Nova Guard to gather more information. She received a message on her cybernetics that the Nova Force were on their way to defend the prison. As they were leaving Ronan ordered Nebula to send their Necrocraft across the galaxy to begin the search for Gamora and her new team, and to cleanse the prison, murdering all of the guards and the prisoners.

Skirmish on Knowhere
Nebula, Ronan, and Korath continued to search for the Orb, until they received a message from Drax the Destroyer telling them it was on Knowhere where they went to recover it. When they arrived they were spotted by Gamora and her new team, who escaped into a mining pod. While Ronan began fighting with Drax, whose wife and daughter had been killed by the Kree, Nebula lead a squad of soldiers in fighters to chase Gamora across Knowhere until Gamora was forced to head into deep space which shut down her pod. Nebula destroyed her ship, despite her pleas, and leaving her for dead in space and retrieved the Orb. Nebula and Korath were present when Ronan told Thanos he was aware of the Orb's nature as an Infinity Stone. Ronan ripped the Orb opened and harnessed it's power, becoming the most powerful being in the universe. Ronan told Thanos he was going to destroy Xandar and then find and kill Thanos. Nebula offered her total loyalty to Ronan should he succeed as Thanos had tortured and mutilated her throughout her entire life. She swore to help him destroy a thousand planets.

Battle of Xandar
When they arrived on Xandar a fleet of Ravagers lead by Yondu Udonta and Star-Lord engaged them. The fleet fired a blot of flame to disguise their moves, Nebula saw that they had dived under the ship and she ordered all their fighters to destroy the ships. Once they received word that the side of the ship had been breached, Nebula tried to convince Ronan to retaliate but he refused, stating that his focus was to land on Xandar, Nebula took a squad of soldiers with her to engage the attackers before shutting the door, locking Ronan in. When the Star-Lord, Gamora, Rocket Raccoon and Drax breached the ship Nebula confronted them. As Nebula began to insult her former sister she was silenced when Drax shot her with a rocket. Nebula's body was damaged, but her cybernetic implants helped to repair her. Once she was repaired Nebula began to fight Gamora. During the fight the side of the ship was torn open, Nebula managed to gain the upper hand and began to electrocute Gamora until Gamora knocked her out of the hole in the Dark Aster and leaving Nebula hanging onto the edge of the hole. As Nebula hung off the edge of the ship with her hand trapped on a spike, Gamora tried to save her and convince her to fight against Ronan, claiming that Ronan was crazy. But Nebula refused and instead cut off her mechanical hand and fell, landing on top of a Ravager's M-ship. She threw the pilot out and flew the ship away from the battle.

Personality
Like Gamora, Nebula despises her father Thanos for torturing her and turning her into a cybernetic assassin. However despite this she always tried, often in vain, to prove her worth to her father. Nebula resents Gamora for being Thanos' favorite daughter, which he has openly expressed even with Nebula present and she showed no hesitation in trying to kill Gamora more than once. Despite this Gamora doesn't not share these feelings for Nebula and even tried to convince her to betray Ronan and help the Guardians fight him even after trying to kill her twice.

Nebula has very little loyalty to a cause as she quickly betrayed Thanos once Ronan harnessed the power of the Orb, believing he could kill Thanos as he declared to do so. However when the battle of Xandar became too intense for her liking she quickly abandoned Ronan to escape, despite her sister's pleas for her to help the Guardians, possibly returning once again to Thanos. Unlike her sister who seeks to atone for her past crimes Nebula does not show any visible signs of regret for her own crimes as she was perfectly willing to murder anyone tasked to her and anyone who stood in her own way.

Powers

 * Luphomoid Physiology
 * Superhuman Strength:
 * Superhuman Durability:
 * Superhuman Agility:
 * Cybernetic Enhancements
 * Nebula-Broken-Jaw.pngRegenerative Healing Factor: Nebula's cybernetic implants allow her to quickly heal from otherwise near-fatal injuries, such as when her body was crushed and mangled when withstanding a direct blow from Drax's cannon. Thanks to her implants, she was able to reshape her body back to its original form by snapping her arms and jaw back into their normal place.

Abilities

 * Master Assassin: Ever since she was a child, Nebula has trained extensively as an assassin under Thanos and Ronan. She trained with Gamora throughout her childhood. She was able to fight "the deadliest woman in the galaxy" for a prolonged amount of time.
 * Expert Combatant: An expert in armed and unarmed combat, Nebula has been seen using dagger-like weapons in battle which can be in a compacted knife form or can be extended to swords.

Cybernetic Enhancements
In her early years under Thanos' wing, Nebula received various critical injuries that required her to endure extensive cybernetic augmentation.
 * Contact Whiplash
 * Tempersteel Claws
 * Concussive Blasts

Allies

 * Ronan the Accuser †
 * Korath the Pursuer †
 * The Other †

Video Game Only

 * Skunge
 * Levan

Enemies

 * Thanos - Adoptive Father, Master
 * Guardians of the Galaxy
 * Peter Quill/Star-Lord
 * Drax the Destroyer
 * Gamora - Adoptive Sister
 * Groot
 * Rocket Raccoon

Trivia

 * Nebula's appearance in the movie seems to be based more on her second incarnation from the comics.
 * Nebula shows complete loyalty to Thanos most of the time, but also states that she would gladly destroy a thousand worlds if it meant Thanos would die. This is possibly out of fear towards him.
 * In Guardians of the Galaxy Prelude, Nebula loses her entire left arm and has it replaced by cybernetics; however, in Guardians of the Galaxy, her left hand appears to be made of flesh.