The Big Three Go To Hogwarts [COMPLETED]

Percy, Thalia, and Nico go to hogwarts to protect Harry in his 4th year. Percy also competes in the Triwizard Tournament as a student from Hecate's School of Witchcraft and Wizardry. Draco, Snape, Luna, Hermione, or any other wizards will not be demigods. Only Dumbledore will be a grandson of Hecate. This takes p...