8th Hero.

There were the 7 heroes. Percy Jackson, Leo Valdez, Piper McLean, Annabeth Chase, Jason Grace, Hazel Levesque, and Frank Zhang. There were only meant to be 7, but Luke had messed up the timeline, because of his whole betrayal and wanted more power. (aka ruling the world 🙄), and so, the gods, Zeus, Poseidon, Athena, Aphrodite, Hephaestus, and all the others.) But that 8th hero, was, you.

Annabeth: "You called for us, Zeus?"