Allen Walker has a few secrets. One, she's a girl. Two, she isn't the real Allen Walker. That would be her brother. Three, her real name is Alexis Walker. Four, she's a witch, and Allen is a wizard. How long can she hide her secrets when Komui sends her, Kanda, Lavi, and Lenalee to Hogwarts? KandaxOC. This takes place during Order of the Phoenix and D. Gray Man Season 2. Disclaimer: I don't own D. Gray Man or Harry Potter.