The Fault in Our Infinity

The Seven won the war with Gaea. Jason and Hazel were lost but caught bravely. Leo vanished off the face of the Earth, and no one knows where he went. Piper went to look for Leo and Frank went back to Camp Jupiter. Percy had to change his last name so that people wouldn't come looking for him. He changed it to Lancaster. He and Annabeth got married and had a baby girl who was diagnosed with cancer when she was 13.