Into The Depths Of Tartarus

Percy Jackson is dead, at least that's what they all think, ever since he was dropped into Tartarus, after facing charges for a crime he didn't commit, no one has seen him, or heard from him, only Hades, but he won't tell Nico anything except that. So when Percy is suddenly released, after 3 long years, when they finally find out that he didn't commit this crimes, he has changed. He angers easily, a foul smirk always played on his face, and seems to be filled with hate. His sea-green eyes now tinted red. Can they get old Percy back?