When I ascended the stairs, I had no idea what was waiting for me. I didn't know what I was going to be asked to do, or the risk they were going to ask me to take. I just didn't know.

Would I have even gone up those stairs if I had known? Probably not.

I suppose I should introduce myself. My name is Alexis Lily Potter and I used to be Harry Potter. Yeah, I know. You're wondering how one can become a girl. Truth is, I have no idea. I went to sleep the night before my seventeenth birthday as Harry and I woke up as Alexis. Not even Remus knew how I became the way I am. Not that it mattered at the time, I had to kill Voldemort.

Now, however, I've done that. I've become older and wiser and just generally grown up. I don't really have any friends or people I can call friends anymore. My parents, Sirius, Remus, Tonks, most of the Weasleys, Hermione, they are all dead. I found out that Dumbledore spied on me. Apparently he knew that Voldemort had to kill me, but he didn't tell me! Whatever, I've moved on.

It was a few years after the war ended. I was twenty now and spend my days taking care of Teddy (my godson) and hiding in Grimmauld Place from the press and fans.

At least until today. Today I was climbing stairs up to the office of the person who I used to call my mentor. Professor McGonagall had sent for me. She was one of the few people I still trusted, so I came - but only because she asked me to.

"Ah, hello Alexis," said Professor McGonagall. "I thought you might be a little uncomfortable in this office, so I've arranged for us to speak in the staff room."

"Thank you, Professor," I replied.

"Dear, don't call me that! I haven't been your Professor in years. It's Minerva, understand?"

"Alright...Minerva." That was going to take some getting used to.

"How's Teddy doing?"

"He's fine. Started talking. Keeps calling me 'Mum'. I don't know what to do about it. I think it would be best if he did, but I don't want to disrespect Tonks."

"In my opinion," said Minerva, "you should let him. Tonks and Remus left him in your care because they thought you were the best person to care for him - to become his 'Mum'."

"Yes, I suppose you're right," I said.

"Well, anyway, to the purpose of this meeting." Minerva took a deep breath. "I want to save as many people who died as I can. I want to send one person back in time to when the war got really bad to stop it."

"And you want that person to be me."

"Yes."