He is a special kid

Percy jackson is just 9 years old when his mother is killed in a plane crash. Alone and scared, Percy has no place to go, until his mother's best friend's fiance, Tony stark, decides to adopt him. Because pepper Pots was heartbroken when she found out that her best friend was killed and her son is all alone. Tony decides to take the kid in, thinking it would be easy.But its easier said than done. percy is quite a handful and it isnt long before the Avengers find out about him. then al of a sudden, when he turns twelve, Poseidon sends Grover to get percy and make him go to camp. However, percy doesnt want to leave Tony and pepper. When he turns nineteen, he finds out that a new evil is rising and the gods need his help.

After that it's just a series of bad events and he ends up leaving. When he returns, wil he be the same? Or did the old Percy Jackson die when he left?