Cloud Waves & Whitecap Horses

At sixteen, Percy Jackson wins a war and loses the person he once anchored his soul to. Then it turns out he's evolved in terms of impossible demigods powers because he now has fire magic as well as water powers to deal with, so he decides to make a job of it and invades the air as well. His career choice has nothing to do with the adrenaline rush. It' a long-term strategy.