Maybe Angels:

The Harry Potter Books, Revised with an Original Character and the Yu-Gi-Oh! Cast

Book Four: Harry Potter and the Goblet of Fire

Disclaimer from Kitty:

You have probably guessed I own neither Harry Potter nor Yu-Gi-Oh, which is true. This, you probably also have guessed, is the sequel to Let Me Fall, my version of Harry Potter and the Prisoner of Azkaban, and you would be right in that as well. The only chars I have any ownership in are Dare, Kara and Kitty (who is technically moi): Melisanne is the property of SGCred. There WILL be some more romance in this story, but there shall be much conflict too. But, as you seem to be good at guessing games, you're sure to guess that I have little reason to write stories unless people are reading it and they tell me what they think, SO PLEASE R&R!