What exactly is the relationship between Loki and Odin in Norse mythology? Why is Loki Odin's adopted son in the movie Thor?

In Norse mythology, Loki and Odin are righteous brothers.

Loki is the god of mischief and lies and the god of fire in Norse mythology. He is the son of the giant Farbauti and the giantess Laufey, and the righteous brother of Odin, the chief god of the goddess Asa, although he is much younger than Odin. However, he has a cunning and treacherous personality, often speaking out of turn and quarreling with the other gods.

In the movie "Thor," Loki is the son of Laufey, king of the ice giants of Jotunheim, and is kept hidden from his father because he is too small for his giant counterpart. After defeating his arch-rival, King Laufey of the ice giants, Odin entered the palace and found Loki alone, and adopted him. p>In the movie Thor, Loki is the "god of trickery" in the realm of the gods. Loki was initially half good and half evil, but his nature is not bad, in his heart, he still regarded Odin as his father, and the Divine Realm as his home and belonging, although he once wanted to dominate and destroy, but in times of danger, he was able to fight in defense of his home.

Loki is not willing to live under the glory of his brother, and vents his frustration by playing pranks, and after failing in his repeated attempts to gain Odin's attention, he has become an even more powerful source of low self-esteem and self-loathing after being given the status of "adopted son" of a "monster orphan. This is why, after receiving the status of "adopted son" of a "monster outcast", his feelings of inferiority and self-loathing intensified. He wants to prove that he is not a monster by enslaving human beings, a cruel and extreme behavior.

But in the end, Loki finally found his true self, accepted himself, and gave his life to save his brother.