Jason Grace is a fictional character from the book series The Heroes of Olympus by Rick Riordan. He is a demigod, the son of Jupiter, the Roman god of the sky, and Beryl Grace. Jason possesses the ability to control the weather and has exceptional combat skills, making him a strong leader among his peers. In the series, Jason is known for his bravery and loyalty. He is a member of the Seven, a group of heroes tasked with saving the world from various threats. Throughout the story, he navigates challenges while discovering his identity and heritage as a demigod.