Jason Grace

Jason is the main character of the second Camp Half-Blood series, Heroes of Olympus.

History
Jason is a 15/16 year old shown to have no memory of his past, not even remembering how old he is.

The Lost Hero
Jason wakes up on a bus belonging to the Wilderness School where kids are sent for doing bad deeds that need to be cleaned up. He finds that he has no memory of even going to the school or having a best friend named Leo and a girlfriend named Piper. Coach Hedge his supposed gym teacher tells him that he's never seen him before today and that the Mist has been manipulated to make everyone think that they know him. He also reveals that he, Piper, and Leo are demigods and that an extraction team is coming to get Piper and Leo to camp along with and unknown "special package" Later, an unnaturally powerful storm arrives and the class bully Dylan revealed himself to be a Ventus (storm spirit). Jason took out his gold coin, flipped it, and Ivilis became a well balanced, completely golden sword. While he and Piper fought off Dylan, Hedge (who revealed himself to be a middle aged satyr) climbed down the canyon wall to retreive Leo, when he was thrown down. Jason also survived a lightning bolt Dylan attacked him with that could have killed twenty men, and when Piper is thrown off of a cliff Jason jumps after her, learning that he can munipulate air. These things may imply he is the son of Zeus or one of the wind gods, though it is not certain. After a long battle Dylan takes Hedge away and leaves Leo, Jason, and Piper on the canyon skywalk. Just then two half-bloods arrive on a chariot pulled by pegasi; a guy named Butch and Annabeth. When Annabeth and Butch notice Jason only has one shoe on (seeing as it was blasted into bits by the lightning bolt) Butch tells them that Annabeth had a vision that a boy with one shoe would help her find one of the campers, who has been missing for three days, Percy Jackson who is implied to be the 'Lost Hero'.

Even though Jason has no memories, he is perceived as a serious person with a moderate sense of humor. He also does heroic things by nature but can't explain why, such as jumping off the canyon cliff to save Piper or getting out his sword to fight Dylan as soon as he attacked his friends, so it is implied he was a heroic person (and probably still is) before he lost his memories.

Interestingly, he mostly uses the Roman terms for the mythical creatures he meets, such as calling Coach Hedge a faun instead of a satyr. This may imply that he is the son of Quririnus, the god of Rome, who could ascend to the sky on a cloud of lightning and was rumored to ride on the air. His sword is also likely called Julius, who was one of the emperors of Rome, all of whom were said to be children of Quirinus.

Powers

 * Jason has the ability to fly, or at least float on air.
 * He is also not harmed by lightning strikes, at least not to the full extent.
 * Jason can manipulate Mist.

Magical Items

 * A gold drachma that turns into a golden sword when flipped and vice versa. The sword hasn't been named yet in the series, but the coin has the word 'Ivlivs' on it, which is Latin for 'Julius.'