The Forbidden Daughter

Y/n Gallagher lives on the south side of Chicago, Illinois with her half siblings. Her mom and step dad leaves them alone to do drugs while the eldest Fiona takes care of them. Y/n doesn't know who her biological dad is since Monica never told her, she only gave her a lightning bolt necklace that her father told her to give her.

One day a monster comes after Y/n which her satyr protector Grover Underwood helps Y/n get to camp half blood with three other kids.

One who turns out to be her older half sister Thalia Grace who was very protective of her little sister. Thalia saved her sister and the two other half bloods to safety turning her into a pine tree by her father, Zeus. Y/n, Annabeth and Luke were immediately claimed by their godly parents Hermes, Athena and Zues.

No love interest