Loki was sent to Earth and a punishment for a prank, years before he discovered his true identity, and was deaged to a baby, with no memories or knowledge of his past. The only thing he knew was his first name, Loki. When he meets the fellow prankster Harriet Potter, well, all hell breaks loose for the world. Two pranksters, one soul, one bond.... Yep. Everyone was doomed to pranks because these two have only each other, and they're not planning on changing that anytime soon. Harry Potter/Avengers crossover. Fem!Harry x Loki