An: Hope you like it. I might will it multi chapter but for now it's just a random idea about a way that Dumbledore could have learned that Harry was a horcrux.
Cassi was mad. Well actually she was mad that her parents were yelling at her as she ran though Hogwarts she was having a mental argument with them "WHY DO YOU WANT ME TO SUPPORT VOLDEMORT" she yelled in her head "I HATE HIM." She knew the answer to this of course. Cassi parents Orrin and Athena Finnagan were pureblood and more importantly they supported He-who-must-not-be-named. Cassi had been sorted in to Ravenclaw 5 years earlier and after last year when Voldemort was found in the ministry she had decided not to fight for him, now she knew she was in danger she had been in the divination room and Trelawney had gone in to a trance. She was scarred really scared and as she ran towards Dumbledore's office she bumped in to something. "what" she yelled sprawling backward she was worried but relaxed as she heard a voice "Bloody hell" and then she saw Ron and Harry she didn't know them that well of course she was a year younger and in Ravenclaw but she know how they looked. Picking herself up and saying sorry she started to run.
When she reached Dumbledore's office she knocked and said the password "Lemon Drops" and sprinted up the stairs and in to his office reaching it she collapsed and said "Sir I know about the Horcruxes and I know what they all are." Dumbledore replied "I know about three but what are the rest?" "Trelawney had a prophecy about 2 but I heard my parents talk about the rest. One is Voldemorts diary, the second is Nagini, number three is the locket, number four is the part inside him, five is the ring, the sixth is Helga's cup, the seventh is the Ravenclaw's diadem and the last is Harry" At the last one Dumbledore took a sharp intake of breath and as his face overcame emotions he said 'I will have to leave a note for Harry and we will have to find and start destroying these. "Thank You Cassi you have been a great help."
She walked back to the common room in silence scared of what would come.