"My father did that with me, a number of years ago," Thor agrees with a slight nod. "I was stupid and hammer-happy and all of that. I directly disobeyed him because I thought I knew better, and as punishment, he took Mjolnir away from me and banished me to Earth without my powers." It seems like a lifetime ago. "But he was the Allfather, the most powerful of us Aesir. I don't know who could —"

Unless .. his sister. His father said that she drew her power from Asgard, and that the longer she stayed there, the more powerful she became.

Could she have been the one to have banished he and Loki here? It would stand to reason that she would if she'd had the power to. Get rid of her sibling competition, become supreme ruler over Asgard and their people, lead them into Ragnarok. It's a worrisome thought, and one that he tucks away to discuss with his brother at a later date.

"I don't suppose I'll ever really know, will I? Who it was who might've banished us? Not as long as I'm here, anyway."