(From reading Camp Half-Blood wikis)
At the end of The Lost Hero, he remembers participating in the Second Titan War; he was the commander at the Battle of Mount Othrys, where he defeated Krios and toppled Kronos's throne with many other Roman demigods.
Appearance
Jason is handsome, with tidily cropped blond hair, bright blue eyes, and a 'cute' scar on the corner of his lip (he tried to eat a stapler when he was two). He is of average height with athletic build, having muscular tanned arms. He has an intimidating tattoo etched deeply under his forearm: 12 straight lines like a bar code with an eagle (the animal of Zeus/Jupiter) and the let