Never trust the God of Mischief.
You'd think everyone would have learned that by now.
Marvel's legendary trickster is a master of sorcery, illusion, shapeshifting, manipulation, and the ancient magical art of convincing otherwise intelligent people that this time the elaborate scheme is definitely going to work out fine. Closely tied to Asgard and forever entangled with Thor, Loki has spent decades moving between villain, rival, reluctant ally, antihero, and occasional savior.
Sometimes...
Loki manages several of those before lunch.
What makes Loki so compelling is that beneath all the magic and magnificent theatricality is a character constantly wrestling with identity. Jealousy, ambition, resentment, and a desperate desire to control the story have repeatedly pushed Loki toward villainy, but Marvel's God of Mischief has also proven capable of loyalty, sacrifice, heroism, and even attempts at genuine redemption.
The problem is...
Nobody believes the God of Lies when the God of Lies says, "I've changed."
Can't imagine why.
Loki's complicated relationship with Thor sits at the center of that story. They're rivals, family, enemies, allies, and quite possibly each other's greatest recurring headache. Loki may understand Thor better than almost anyone, which naturally provides an extraordinary amount of useful information for betraying him.
Fans love Loki because you never quite know what happens next. One story might feature an elaborate attempt to seize Asgard. Another might find Loki reluctantly helping save reality from an even greater threat. Across comics, animation, games, movies, and television, the details change while Loki remains clever, charming, arrogant, dangerous, and gloriously unpredictable.
Trust Loki?
Absolutely not.
Invite Loki back for the next adventure?
...Yeah, probably.