Hello everyone I'm am here to start a new story since I'm having a bit of writer's block with my other story and I am just loving writing these crossovers! So I hope you enjoy!

Disclaimer: I do not own Percy Jackson or Harry Potter! Now on with the story!

Chapter One: Train Ride

Nico's POV

I couldn't believe I was doing this! I thought to myself as I sat in an empty train compartment on the Hogwarts Express twirling the skull ring on my finger. I stared out the window thinking about what my dad had told me only four hours ago.

~αναδρομή στο παρελθόν~ (flashback)

I was there, on one knee before my father with my head down as he told me everything I needed to know about this task. I was I little mad because the war with Gaea had only ended a month ago on Agust 1st. "Do you understand son?" My father asked.

I raised my head to look at him in the eyes. "Yes Father." I said as I stood up. "Everything you need will be in this suitcase." My father said as he waved his hand. Infront of me was a pitch black suit case with a picture with my father's symbol in silver thread. I grabbed the handles of the black duffel bag, gave a slight nod to my father and shadow traveled to the station I climbed on to the train and found an empty compartment and sat down.

~τέλος του αναδρομή στο παρελθόν~ (end of flash back)

I kept twirling the skull ring faster and faster around my finger with every terrifying thought that ran through my head. My breathing got rapid with worry that if something went wrong the two worlds could declare war on each other. The wizards with their cocky personality because the can wheeled the power of Hecate without even knowing who she is, and the demigods with their paranoia about another war after the war with Kronos and the war with Gaea. No... I couldn't think about that, that would only get me caught faster.

At least Dumbledor is expecting me since he's the one that called on my father for the favor I though as I started to relax into my set and started taking deep breaths to calm myself down. I pulled out my book and started reading 'Rare Greek Monsters' I need to know how to face these monsters of I ever run into one of these. I kept reading even when the train started moving. I looked up from my book when I saw three people open up the compartment door.

"Do you mind?" A girl with bushy brown hair asked me, "Everyone else is full." I nodded my head at the three signaling that they could sit down. I got a good look at the three kids and I knew immediately that they were Hermione Granger, Ronald Weasley, and Harry Potter. The boy I'm supposed to protect and his two best friends. "Hello I'm Hermione Granger." The girl said sticking out her hand for me to shake. When I didn't except her hand but instead turned another page of my Greek copy of the book she retracted her hand and moved on to introduce her friends.

"This is Ron Weasley, and..." she trailed off seeming worried, "Harry Potter." They all flinched as if waiting for a reaction that never came from my mouth nor ever will come from my mouth. "Are you mental?" The red headed boy exploded, "Ron!" Hermione began to lecture him but he continued. "Do you not know who Harry Potter is?" He asked/shouted at me. I closed my book and answered him, "Oh, I know who he is," I informed them, "it's just most people don't like to be reminded of the day their loved ones died, I'd know that better than anyone." I added the last part as barely a whisper but they obviously heard me.

I was in for a long ride...

So what did you guys think of the chapter put in the comments what house you think I should put Nico in... please comment and tell me what you think!