Dear Professor McGonagall,
Greetings, my name is Harry James Potter and I would be honored to be a student of Hogwarts. Thank you for considering me to be a student. But, there are a few things you should know before I arrive. You see, I'm not the lad you'd think I'd be. About 4 years ago, my family (spits on the ground) and I went to the States so that my Uncle could try and cheat someone out of a lot of money. Keyword: try, anyway it failed and as usual, he was going to take it out on me but on our way to the hotel, the taxi cab we were in swerved and hit an electric pole killing everyone else and trapping me in the car.
I was rescued by a young woman dressed strangely she looked like she was wearing a cat-girl super hero costume. I know, like I said 'strange' but that's neither here or there. After she saved me, she wanted to know if I was alright but before I could answer, the cab blew up sending us flying away from it. Next thing I know, I was in a hospital covered in bandages and a girl was holding my hand. When she found out I was awake, I could tell she was crying and was quickly apologizing about not being fast enough and turning me.
I was of course confused, turning me? What did she mean by that? Well, it turns out that she really is a cat-girl, a were cheetah to be exact and she had to turn me to save my life. So afterwards she introduced me to her father who ended up being one of my teachers and told me that I had were blood in me as well. I will tell you everything on the promise that you don't tell the Headmaster as I do not trust him.
Once again, thank you for your consideration for my enrollment.
Sincerely,
Harry James Potter