This Article Contains Spoilers -
WARNING: This article contains major spoilers. If you do not wish to know vital information on plot / character elements in a story, you may not wish to read beyond this warning: We hold no responsibility for any negative effects these facts may have on your enjoyment of said media should you continue. That is all.
I am Loki of Asgard, and I am burdened with glorious purpose.
~ Loki introducing himself to Nick Fury.
Loki is a major character in the Marvel Cinematic Universe. He started off as the main antagonist of both Thor and The Avengers, but later becomes the tritagonist anti-hero of Thor: The Dark World and the deuteragonist of Thor: Ragnarok. He is set to appear in both parts of Avengers: Infinity War in an unknown role.
He was portrayed by Tom Hiddleston, who also played Captain James Hook in The Pirate Fairy, Thomas Sharpe in Crimson Peak, and later voiced Lord Nooth in Early Man.
Loki is the God of Mischief, and an expert liar. Though Loki tries to take over Asgard and Earth, all he really wants is the approval of his father and brother. He is a smart and intelligent man, and he will stop at nothing to fulfill his quest. While he may appear nice, in truth, Loki believes he is destined for a "glorious purpose", whether it be ruling Asgard or Earth. He is usually considered a lying and manipulative trickster, but this is only because he wanted to be an equal to Thor. Therefore, Loki does have emotion and he does communicate with some people despite his power and arrogance.
His personality develops with each film he appears in: In Thor he is initially good and altruistic. However, as soon as he discovers that Odin lied to him about being his son and that he was actually a Frost Giant that everyone on Asgard told him were vicious and heartless monsters. Loki broke down as he started to feel like Odin saw him as a monster as well, which caused him to believe it was the reason why he would never give him the throne and ignored him over Thor his whole life. Because of this, Loki snapped and decided to plot a revenge scheme to take the throne for himself. He showed a darker personality after those events and alot of arrogance and vanity, as well as having no problem with manipulating people to get what he wants. Despite all of this, Loki was still shown to deeply love his mother Frigga, and shows a sense of remorse for his actions in the end of the movie, telling Odin that he could have done better. But, after Odin denies him, Loki attempts suicide, believing there was no hope of redemption.
In The Avengers, Loki's sanity had slipped away after he survived, this time only caring about taking over the world. It was revealed that he was doing this because he believed that it would end the wars between the human race. However, he also killed alot of people during the movie in order to achieve his goal. He showed a callous deamanor and expressed superiority towards everyone throughout the movie, as well as threatening or murdering anyone who were against him. He did, however, shed a small tear after attacking Thor and in the end of the movie, accepted defeat when he was outmatched by the Avengers.
In Thor: The Dark World, Loki was shown to throw sarcastic comments at Odin who judged him for his actions. However, his sarcasm dropped as soon he was told that he wasn't allowed to see his mother Frigga anymore, seeming as if he was trying his hardest to hold in tears. This got worse after he finds out that she was killed, causing him to feel extremly depressed and possibly shameful that the last interaction he had with her, was an argument. However, he later joins Thor to avenge Frigga, and later sacrificed himself to save Thor. Although everyone believed Loki had died, it was soon revealed that he faked his death to get the throne.
In Thor: Ragnarok, Loki helps Thor on his adventures and had shown to care about his well being several times during the movie. He did, however, still have some trouble remaining on his side. Because of this, Thor couldn't trust him and left him behind during the movie. Despite Thor's actions, Loki still shows up to rescue Thor later, showing that he truly wanted to atone for his mistakes. In the end, Loki also retained the brotherly bond with Thor and seemed to finally accept Thor being king.
Powers and Abilities
Loki's main weapon may be his intelligence, but he is still an extremely powerful being:
Superhuman Strength and Durability: Loki was strong enough to knock Thor and Captain America to the ground in combat, throw Stark across a room and through a window, and send other humans flying with a single strike. He is shown as being only phased after taking strikes from Captain America's shield, fists and kicks, recovers being struck by Iron Man's repulsors and Thor's strikes and survived a beating from the Hulk that would have killed most others. He was also unharmed by machine gun bullets, an explosion from one of Hawkeye's arrows and rather long falls.
Superhuman Speed and Agility: Loki is capable of moving at speeds and evading attacks beyond human capabilities which he used in his battle with the Captain.
Combat: Centuries of training in Asgard has made Loki an extremely dangerous and unpredictable opponent. He was able to kill several Frost Giant's, match Thor, overpower the Captain and kill a group of Dark Elves in combat. He is completely capable of fighting with spears, knives or even his bare hands, with utter ease.
Weapons Handling: Loki's signature weapon is a dagger which he handles with marvelous skill, using it to defeat several Frost Giants and Dark Elves single-handedly. He is proficient with throwing knives which he used to kill SHIELD agents with a perfect on the mark throw. He is also formidable with spears, using Gungnir and the Chitauri spear to great effect as close combat weapons, riffles and tools.
Cryokinesis: Not long after learning of his Jotun blood, Loki discovered and mastered an ability to create and manipulate ice, which he used to freeze the Bifrost in place when trying to destroy Jotunheim.
Magic: Using his inborn skills and his teachings by Frigga, Loki is capable of using impressive magical abilities for a wide variety of situations. These include but are not limited to:
Frost Giants - Biological Family
Laufey † - Biological Father and Victim
Bor † - Adoptive Grandfather
Odin † - Adoptive Father and former king
Frigga † - Adoptive Mother and former queen
Thor - Adoptive Brother and Situational Ally
Hela † - Adoptive Sister, Enemy and Attempted Killer
Loki is the first villain to appear in more than one film of the Marvel Cinematic Universe - possible exceptions include Thanos (Appearing in end-credits scenes in both Avengers movies, and debuting properly in Guardians of the Galaxy), Baron von Strucker (Who appeared in a mid-credits scene in Captain America: the Winter Soldier and as an antagonist in Age of Ultron), and Klaw (Who appeared in both Age of Ultron and Black Panther). He has appeared in Thor, The Avengers, Thor: The Dark World and Thor: Ragnarok making him so far the most recurring independent villain of the series.
Loki is the second antagonist to be defeated by a lone main protagonist so far in the MCU. Iron Monger and Aldrich Killian were both killed by Pepper Potts; Malekith was crushed by his ship; Red Skull was vanished due to the Tesseract; and Whiplash was defeated by Iron Man with the help of War Machine. Loki and Thor's fight in Thor ended in a stalemate whereas in The Avengers, Loki was beaten by Hulk. Ironically, Hulk also beaten by Abomination, making Hulk the victor in two consecutive good vs bad fights and the first one to beat an antagonist in a fair fight without any assistance, the second being Ant-Man who defeated Yellow Jacket.
He is the only antagonist in the Marvel Cinematic Universe to serve as the main antagonist of more than one film.
Loki was Tom Hiddelston's breakout role.
The scene in Marvel's The Avengers in which Loki is overpowered by the Hulk is considered to be one of the funniest and most memorable moments in the MCU.
Because of the reason he appears in more than one film, overall, he is considered to be the secondary antagonist of the entire MCU, but after his redemption he is considered one of the main protagonists of the MCU.