POWERS

In this one Sally is the daughter of Medusa
she doesn't inherit the Gorgon powers due to Medusa praying to Hecate to block off her power.
Percy was blessed by Hades, Hecate and Persephone.

Medusa was pregnant by Krios, titan of the stars and galaxy. It was due to a meteor shower when Krios was able to escape, due to Krios being a titan he wasn't affected by the Gorgon powers of Medusa.

Percy is still the son of Poseidon but he inherits
•water manipulation
•ice manipulation
•water healing

see the rest in the chapters.

I don't own PJO I'm just a person who tries to entertain other with his story.