His Dark Side (Edited Version)

Percy Jackson has had a hard life, and no one denies that. They think they know everything there is about their hero, but Annabeth has her doubts. In Tartarus, she got a quick glimpse of something that terrified her. She, nor he, ever brought it up again, but it always lingered in the back of her mind. What had she seen down in Tartarus? Was it possible the happy, preppy sass king had a dark side?
[Revised Version]
Trigger Warnings: Depictions of Suicide, Self Harm, Abuse, Depression, Anxiety, Self-Loathing,