Flying on Thin Air -Fandom Clash Book 1

So Percy and gang get a new member and go to Hogwarts, and Harry thinks their Death Eaters and is suspicious of the insane-ish 15-year-old girl. Rated T to be safe. The cover is made by Fluff-n-Puff, check out their account on Wattpad! Please look through chapters 1-6 as a sort of background and 7 onward as the story.