Trans-verse

The Trans-verse is an alternate universe where in between the Battle of the Labyrinth and the Last Olympian, Percy Jackson is turned into a girl by Artemis after he accidentally saw her naked. Artemis manipulates the mist so that mortals will believe that Percy always was a girl. Artemis changes Percy's gender but not what gender he is attracted to, so he still has a crush on Rachel and Annabeth. This also didn't change the fact that Annabeth loved Percy and the two of them still wind up becomign a couple.