The goddess not so ordinary

Long before Percy Jackson, the daughter of Zeus and Hera was born, named Selena and created as a hope and a protection for the gods in case something bad happens. Her sister Eris, jealous, threw her into the world of humans. She had to face challenges living as a "human" for thousand years and always sought to pursue her destiny. After saving Percy and Annabeth from vampires, things get complicated between the 2 saviors. One day, Selena encounters the camp half-blood, and makes many friends and enemies along the way. How will she be able to overcome all the threats? What is her destiny?