One of the most beloved character in the Marvel comics and movies, Loki, the God of Mischief, is a powerful deity. Due to his divine origins, he has powers beyond the strength of nearly every main hero across the Marvel universe. He plays the roles of both the hero and villain, depending on where his personal interests lie.

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As many fans know, Marvel's Loki is based off a the mythical Norse god of the same name. The two share similarities, but the modern version of him features many obvious differences from the old myths. From his lineage and family to his personality traits, Marvel molded and changed some notable attributes of the iconic brother of Thor.

10 Changed: His Relationship to Thor

In the Marvel universe, Thor and Loki are adopted brothers with a tricky love/hate relationship that fluctuates constantly. They love each other deep down, but Loki is quick to backstab his brother while Thor cannot ever fully trust the other.

In actuality, the two aren't brothers at all. In mythology, Loki made a blood-oath as a brother to Odin, which would make him Thor's step-uncle. The two did have their friendly adventures together, but their relationship ended in eternal hate and betrayal, unlike in the Marvel movies and comics.

9 Kept: His DNA

Loki is a half giant in both the Marvel universe and in Norse mythology, with one of his parents being a goddess and the other a full giant. Marvel did change the roles of his parents, however. His father, Laufey, is actually supposed to be his mother, as told by Norsemen.

This combination of being part giant and part god sparked Loki's incredible power and shapeshifting skills. He is not blood related to Thor or Odin in either the Marvel universe or Norse folklore.

8 Changed: His Children

Anyone watching the Marvel movies can see that Loki doesn't appear to have any children. However, in Norse tales, Loki has fathered multiple children with multiple other entities.

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Loki is actually the father of Hel, named Hela in Thor: Ragnarok, rather than her brother as he is described in the Marvel film. He also fathered Jörmungand, the serpent that ends up killing Thor at the end of the world, as well as a wolf named Fenrir. He also gave birth to Odin's eight legged horse Sleipnir, when he shape-shifted into a mare.

7 Kept: He's Both Good and Evil

Loki faces many hard decisions with his loyalties and goes through many changes in heart throughout his existence. He plays the role of a hero many times in both Marvel and myths, fighting alongside Thor and others in many known adventures.

Though Loki cares about and is loyal to Asgard at times, he will easily flip sides. Sometimes he pulls deadly tricks on those he supposedly sided with, based on his personal interests. This stands true with both versions of Loki, as he is truly the god of mischief and loves to stir things up.

6 Changed: His Wife

In Norse folklore, Loki is married to the goddess Sigyn, who bears two of his sons. She is utterly faithful to her husband, even if the other gods hate him. In Poetic Edda, Sigyn stands by her husbands side while he withstands punishment from the other gods, holding a bowl to keep venom from falling into his eyes while he is bound to rocks.

Though Loki in the Marvel comics tells a version of the story of Sigyn, the MCU leaves out Loki's romantic interests completely. The films haven't featured Sigyn — at least not yet.

5 Kept: Gender and Sexuality

Up until 2021's Loki series which revealed the character's bisexuality, there was no mention of Loki's romantic inclinations in the MCU. The Marvel, meanwhile, fully establish that Loki is gender fluid and pansexual, just like the Norse myth he is based on.

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Since Loki can shape-shift, he can swap genders and identities whenever he pleases. He has been romantically involved with many different races and creatures of multiple genders, even giving birth to a child while in the body of a mare.

4 Changed: Final Betrayal

Marvel's Loki played an important part in Thor's life as his half brother, trying to make up for his wrongdoings and struggling to stay loyal to him in the end. However, the last mention of Loki in Norse tales is when he completely betrays the Asgardian's trust and causes the death of Baldr, a son of Odin.

Loki finds Baldr's only weakness and tricks his blind brother into killing him with it. Afterwards, he is caught and imprisoned to be tortured. Loki ends up being an enemy to Thor in the very end.

3 Kept: Appearance

Though there isn't a concrete vision of what Loki looked like in Norse mythology, texts consistently refer to him as handsome, charming, and attractive. Tales describe him as less muscular and thinner than Thor and other warriors, with a long, thin face.

In the Marvel universe, and especially in the MCU, Loki accurately takes on very appealing, handsome, thin features. He can change his appearance whenever he wants, so he takes on many forms, not always looking like his typical humanoid self. However, he reverts back to the above description as his preferred form.

2 Changed: His Death

The prophesy of Ragnarok supposedly tells what will end the world as we know it, killing off Asgard and all of the gods. In the MCU, Thanos kills Loki while protecting the latter is protecting his brother, after the two saved their people from Ragnarok.

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In reality, the myths state that all of the gods died in the mighty battle. Loki and Heimdall face off and end up taking each others lives, since Loki ends up being a villain and enemy of Asgard in the end.

1 Kept: Shapeshifting

One of Loki's most beneficial powers is being able to shape shift. This doesn't limit him to humans, but any other species, animal, monster, or race he can think of. He uses this ability to fool others, usually remaining undetected by those he wishes to trick.

The MCU has only shown him shifting into other main characters so far. However, in the mythology, Loki has changed into every gender and countless creatures. As described above, he has even mated with beings of other species in Norse folklore, resulting in hybrid creatures.

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