Not a Mary Sue FanFiction

Cousins

Cousins

Gen
G
Updated
19.04.2025
Fandom
Harry Potter - J. K. Rowling Percy Jackson and the Olympians - Rick Riordan
Characters
Harry Potter, Ron Weasley, Hermione Granger, Hermione Granger & Harry Potter & Ron Weasley, Percy Jackson, Annabeth Chase, Quirinus Quirrell, Albus Dumbledore & Harry Potter, Poseidon (Percy Jackson), Percy Jackson & Poseidon, Luke Castellan, Grover Underwood,
Tags
Alternate Universe - Canon Divergence Secrets I'm Bad At Tagging idk how to tag Crossover Cousins or whatever Poseidon (Percy Jackson) is a Good Parent sally jackson is the best Harry Potter is NOT a demigod and NOT OP or a practical mary sue
In another world, Sally was Lily and Petunia’s cousin. In another world, when her parents died, she was raised by the Evans. In that world, Harry Potter and Percy Jackson are raised alongside each other.