In 'Percy Jackson rescues Jedi Padawans fanfiction', Percy would first have to understand the world of the Jedi. Maybe he'd be confused by the Force at first. But once he gets it, he could combine his skills with the unique powers of the Padawans. For example, he could use his sword - fighting skills along with the lightsabers of the Padawans to defeat their common foes. And his ability to communicate with sea creatures could potentially give them an edge in certain battles if there are any water - related areas in their adventure.
Well, in this fanfiction, Percy might use his water - controlling abilities to help the Jedi Padawans out of some dangerous situations, like floods created by the bad guys. He could also use his demigod speed and strength to fight off the enemies that the Padawans can't handle on their own.