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 the son of Jupiter and Ms. Grace ; he is a blood brother to Thalia, daughter of the greek version of Jupiter: Zeus. He was born seven years after Thalia. Thalia loved him very much and because she wanted to watch over him, she stayed with her mom. When he was two years old, their mother took them to Sonoma Valley. There he was taken by Hera and then given to Lupa.

The Lost Hero
Jason wakes up on a bus belonging to the Wilderness School holding hands with a girl he doesn't know. 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. Gleeson 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
Even after losing his memory, Jason's foremost characteristic is his loyalty to friends. A serious young man with a moderate sense of humor, Jason is a born hero who hates cruelty and injustice. Though a natural leader, he can be plagued by doubt and criticizes himself whenever he makes an error.

Physical Appearance
Jason Grace is described to be handsome, with tidily cropped blonde hair, bright sky blue eyes, and a friendly scar on the corner of his lip from trying to eat a stapler 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 arrived at Camp Half-Blood.

Abilities
Jason's abilities include:
 * Fighting Skills: Jason is an expert spear and swordsman due to legion training.
 * Linguistic: As a Roman Demigod, Jason has an inherent comprehension of Latin.

Specific Abilities
Being the son of Zeus/Jupiter, Jason holds command over the weather. Because of his parentage, Jason's powers are greater than the children of nearly every other god. Jason also has influence over the creatures of the sky. dominate the wills of storm spirits. electric shocks.
 * Aerokinesis: Jason can control air currents and
 * Electrokinesis: Jason is able to conduct and generate as well as summon lightning and
 * Lightning Immunity: As a demigod of the sky, Jason is naturally invulnerable (mostly) to electricity.

Family
Thalia

Jason's sister, Thalia Grace, was born by Zeus. Thalia is a Greek because when Zeus visited her mother the first time, he was in his Greek form. When Zeus came to Jason's mother for the second time, he came in his Roman form, Jupiter. Jason is therefore a Roman demigod.

Love Interests
She and Jason share many romantic moments throughout The Lost Hero. He has much concern for her, as he does everything to help her, such as when she says they should get together he says in his thoughts together, yes.He puts his hand on her waist to support her when she collapsed due to hypothermia.At the end of The Lost Hero, she and he have a romantic moment at the end of which they repeat what they said in Piper's Mist induced memory of them kissing.
 * Piper

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 with her.
 * Reyna

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.
 * He has super power vision eyes that burn through metal.

Trivia

 * Jason was named after the original Jason, a mortal, by Jupiter to please Hera/Juno after being conceived.
 * It is revealed that Jason and Thalia Grace are the only demigod pairs to be full siblings (having the same mortal mother and godly parent) but having the different aspects of the god.
 * 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/Gaia 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 Jupiter).
 * 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 living demigod child of the Big Three that doesn't have black hair.
 * Jason is the only demigod to survive seeing a god's divine form (Hera).
 * Thalia and Jason are both mentioned to like cheeseburgers.
 * Jason and Thalia are the only siblings mentioned to be full-blooded siblings that have different depictions of their father.