Annabeth: After the war Camp-Half Blood was kinda a wreck so she was chosen to re-design it. She still loves Percy and is still sorta recovering from Tartarus and the war.
Percy: Percy still loves Annabeth. He found out when he came home from the war that his mother is pregnant. He is a little more mature but not really...
Piper: Piper has been keeping in touch with her dad and she loves the Camp. Jason and Piper are still dating and things are going strong.
Jason: He's been hanging out with Piper a lot. Every week they usually go out to look for Leo but Chiron has told them to settle down and take a break. Thalia comes to visit with the hunters. Sometimes he goes to the Roman camp just to visit.
Leo: Leo has found Calypso and is on his way back to the Camp after showing Calypso around the world.
Frank: Frank has been enjoying himself as Prater Of New Rome. Life with Hazel is great and Camp Jupiter is doing awesome.
Hazel: Hazel is still going strong with Frank and has been practicing her power. She visits Camp-Half Blood a lot still with Frank.