This is my first attempt at a fanfic, it might suck, I don't know if I keep going. Anyway, here we go.
Nineteen years later, as the Weasley and Potter children boarded the train, there was much anxious muttering between Albus and Rose as to what House they would be sorted into. They hung a little, and when Al turned back to give a final goodbye to his father, Harry was engaged in a conversation with an extremely tall student, who looked even taller. The two shook hands and the unknown child stared at Al while he passed to board the train. Al and Harry shouted their goodbyes as the train gave one last steamy whistle, and then the scarlet thunder rolled again and they were off to Hogwarts. Victoire and James felt obligated to escort their younger siblings at least to a compartment. Al looked around, but did not catch another glimpse of the tall student who was talking with his father. James and Victoire both said hi to a few friends on the way to the back, where they discarded their younger siblings, and were about to leave when the door was blocked. Now that Al had a better view, he could see that the tall boy was at least seven feet tall. He struggled to get through the compartment door. Surprisingly to all the children, he addressed them like they had a meeting set up already.
“So, everybody here? Good, good.”
“Me and Victoire were just leaving, if you could excuse us both,” said James, slightly taken aback by the sheer size of the guest. He made to push past the giant, but was pushed back into a chair. James drew his wand, to the laughter of the large boy. Al didn’t think he looked any older than himself, certainly not older than James. He wondered how a person could become so large, but there was still a lot of magic that he didn’t know.
“James, you couldn’t hex me if you wanted to, but I got the point. At least let me tell you why I’m here before you start trying to hex me. I’m here because your parents want me to be here.” He waited for a response, which came from Victoire before it came from hot-headed James.
“What do you mean, our parents wanted you here? Do you even know who my parents are?”
“You’d be hard-pressed to find a wizard who hasn’t heard of your parents, Victoire”—
“—How do you know my name,” demanded Victoire.”
“Slow down, I can only take one question at a time. Your parents are Ron Weasley and Hermione Granger, who is now Hermione Weasley, and your sister is Rose. Their parents are Harry Potter and Ginny Weasley, now Ginny Potter, and Albus is the brother of James, who for some annoying reason won’t take his wand off me. Seriously, kid, if you want me to take that thing from you, I will.”
Enraged at being called kid by a person younger than he and being treated in this way, James cast a spell. Nothing happened. Again, he cast a stunning spell, and again, it was simply absorbed by the massive figure.
“Okay, I guess I’d better explain myself further, if I can finish a sentence without being interrupted. My name is Paul Davis, though you may hear me referred to as Patrick Dunn or Peter Disbro. I’ve gone by many names in my life. This is because nobody has any idea when I was born, where, or how I got where I got. My first memory is of about nine hundred years ago, since the first discovery of magic. My entire life has been devoted to protecting and guarding wizards and witches who are not yet of age. All my initials have been P and D, Public Defender. The only name I’ve always reacted to is Petey, because it sounds so much like PD. I am, as you notice, freakishly large, which opens to interpretation whether or not I’ve got any giant blood in me. The general consensus is that I do, so James, it’s not your fault that stunning spell didn’t work. I am a multiple animagi, I can turn into a shark, gorilla, dragon or an eagle. I know magic that is exclusive to China, Africa, India, Japan, England, France, Germany, American and many other countries. I consider myself an American because I seem to spend a lot of time there, and that’s what my accent paints me as. I speak basically every language known to man. I am known only to those who employ me or have employed me, I pick those that I protect. My list of accomplishments can go on and on, but going over nine hundred years of accomplishments would eventually cease to be relevant. So, who wants to know why I’m here?” _________________ "If you're going through hell, keep going."
I went and screwed it up, it would be rough going on from here and I've got no clue where I'm going. I'm starting another one, this one's dead. _________________ "If you're going through hell, keep going."