Problems at the Tri Wizard Tournament

(Y/N) Gaunt and the 10th Doctor have been traveling together for a while now, but what if the TARDIS takes them to Hogwarts. (Y/N) is over the moon for being at a place she never thought she'd go to, but it gets a whole lot better! She is about to meet all of her idols and spend a year at Hogwarts with them! How will everyone react to having these strangers in their school? Will they be able to prevent the problems that will come? Or will The Doctor's presence attract more evil than ever before?

I do not own BBC Sherlock, Doctor Who, Harry Potter or Marvel.