Jason Grace

"I'm the son of Jupiter! I'm a child of Rome, consul to demigods, praetor of the First Legion. I slew the Trojan sea monster. I toppled the black throne of Kronos, and destroyed the Titan Krios with my own hands. And now, I'm going to destroy you, Porphyrion, and feed you to your own wolves."

- Jason confronts Porphyrion.

Jason Grace is one of main protagonists of the second Camp Half-Blood series, The Heroes of Olympus. He is a Roman demigod, a son of Zeus, as his Roman counterpart, Jupiter, and full-blood brother to Thalia Grace.

History
He is a son of Jupiter and the mortal Ms. Grace; he is a blood brother to Thalia. He was born seven years after Thalia: she loved him very much and he was the only reason she stayed with her mom. When he was two years old their mother took them to Sonoma Valley and there he was taken by Hera and then given to Lupa, not to mention that he tried to eat a stapler at that same age.

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 and satyr protector (though Jason doesn't know that yet), 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 (Annabeth and Butch) is coming to get Piper and Leo to camp along with an unknown "special package", which turns out to be Jason. This story is confirmed when Jason sees Leo make a working mechanical helicopter out of pipe cleaners. Later, an unnaturally powerful storm arrives and the class bully Dylan revealed himself to be a Ventus, or Venti (storm spirit), Greek form anemoi. Jason instinctively took out his gold coin (ivlivs), flipped it, and it 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 retrieve Leo when he was thrown down. Jason also survived a lightning bolt with which Dylan attacked him that could have killed twenty men, (it blew off his shoe though) and when Piper is thrown off the skywalk Jason jumps after her, learning that he can manipulate air. 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, son of Iris (the rainbow goddess), and Annabeth, daughter of Athena. When Annabeth and Butch notice Jason only has one shoe on (as the other one 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 two days, her boyfriend Percy Jackson.

After they arrive at Camp Half-Blood, they find out Hera is in danger, and Jason must lead a quest in order to save her. He chooses Piper, who is now claimed by Aphrodite, the goddess of love, and Leo, who was claimed by Hephaestus when they got to Camp Half-blood, to go with him on his quest.

When he, Piper and Leo arrive back at camp, he is visited by Juno when in his cabin alone, and is given a new gladius as a replacement for the one he lost while fighting the giant, Enceladus. After this, a head counselor meeting was called, where he then revealed that he is from a Roman equivalent of Camp Half-Blood, and that is where Percy is most likely at.

Personality
Jason is a serious person with a moderate sense of humor. He is naturally heroic, even after suffering memory loss he was able to wield his sword and lance with perfect ease. He cares deeply for his friends, and many times almost gives his life for his friends.

It is suggested in The Lost Hero, based on Jason's recovered memories and the fact that he was "exchanged" for Percy Jackson, that he is Percy's same postion a leader from the Roman demigod camp. Like Percy, he is viewed as both his camp's wartime leader and its greatest warrior. Having defeated Krios in single combat during the Battle of Mount Othrys. He is also the only living demigod to duel a Titan and live, apart from Percy himself, who has dueled 4 Titans (Hyperion, Atlas, Kronos, and Iapetus) and lived. He's also one of the only demigods yet to defeat a Titan without any help.

Physical Appearance
Jason Grace is described to be handsome, with tidily cropped blonde hair, bright blue eyes, and a friendly scar on the corner of his lip from trying to eat a staple when he was two years old. He is of average height with athletic built, having muscular and tanned arms. He has an intimidating tattoo etched deeply under his forearm: twelve straight lines like a bar code with an eagle (the animal of Zeus/Jupiter) and the letters "SPQR", which is "Senatus, Populusque, Romanus" and meaning "The Senate and People of Rome" over the lines. Though Jason doesn't remember where he got the marks, he believes that they were burnt onto his skin before he was the Roman Camp Half-Blood's wartime leader appointed by Lupa.

Abilities

 * He has aerokinesis allowing him to fly since he is a son of Zeus/Jupiter.
 * He is immune to lightning strikes (though they can still hurt).
 * He has electrokinesis.
 * He has ADHD.
 * He can speak fluent Latin due to the fact he is a Roman demigod.
 * He has had legion training.
 * He can control the winds, and Venti.

Love Interests
Jason is very sure he likes Piper. There are hints that they may have a relationship, as seen in Chapter I and a few more chapters. Jason can't remember that well (since he had his memory erased by Hera), but he is sure that they had a relationship, in the Roman Camp Half-Blood.
 * Piper
 * Reyna

Jason likes Piper, but is sure that he had a relationship with someone in the Roman Camp, and his memory hasn't fully come back. His memory had been stolen not erased. Hera/Juno gave him memory back, but some memories she must have wanted to come back to his mind later.

Magical Items

 * A coin made of Imperial Gold, it turns into a golden sword on heads or a golden javelin on tails when flipped. The weapon hasn't been named yet in the series, but the coin has the word 'Ivlivs' on it, which is Latin for 'Julius.' It was destroyed by Enceladus.
 * A gladius that Hera/Juno gave him after the coin was destroyed towards the end of The Lost Hero.

Trivia

 * Jason was named after the original Jason, a mortal, by Zeus to please Hera/Juno after being conceived.Jason_medea.jpg
 * It is revealed that Jason and Thalia Grace are one of the very few demigod pairs to be full siblings (having the same mortal mother and godly parent) besides Bianca and Nico di Angelo, Connor and Travis Stoll, and Castor and Pollux (who were twins).
 * They are also the only known siblings to be from different aspects of the same God. Thalia is a Greek demigod (being a daughter of Zeus), and Jason is Roman (being a son of Jupiter), as stated by Hera/Juno herself.


 * Jason and Percy were forced to trade places at each other camps as they are seen as the camp leaders (the most respected campers), by Hera who stole their memories and place them in each other camps. Hera did this in the hopes that they will come to understand each others culture and unite them in their fight against Gaea and her army of Giants.
 * Jason received the scar on his upper lip from a staple after he tried to eat a stapler when he was two years old.
 * It is hinted that he had a girlfriend back at Roman camp named Reyna.
 * At one point Piper calls him 'Sparky' (since his heritage comes from Zeus/Jupiter).
 * He is the leader of the Zeus cabin.
 * Unlike other children of Zeus/Jupiter Hera doesn't hate him or try to kill him like his other sibilings. Hera said that she was Jason's patron and Jason was her champion.
 * Jason is the only demigod to survive seeing a god's divine form (Hera).
 * Jason, is the only known living demigod child of the Big Three, who does not have black hair.