A/N Guys I am super sorry that I didn't update in a while. I don't even have a good excuse except for the fact that I got addicted to other fanfics. I'll try to make this long to make up for it!

Also just realised that I didn't add the disclaimer so

DISCLAIMER: I DO NOT OWN ANY OF THE CHARACTERS IN THIS STORY THEY BELONG TO J.K ROWLING AND RICK RIORDAN RESPECTIVELY.

There all done.

Hermione POV

We rushed onto the train with the demigods in tow. We searched every cabin but all of them were already full. In the last one though, only one man sat.

"He's asleep." Nico informed us. I jumped. He went inside and sat next to him. The man's brown hair poked out from the top of the sheet that was covering the rest of his body. I gazed at his suitcase that was kept together by some neatly knotted string. "Professor R.J. Lupin" I read. "Do you know everything?" Ron asked me incredulous. "It's on his suitcase, Ronald" I explained. All of us sat down. "What do you think he's teaching?" Ron asked. "There's only one position open isn't there? Defence Against the Dark Arts." I told them. "I hope he's up to it. Looks like one good hex will finish him off." Ron said.

After that there was silence. But then the exchange students starting talking amongst themselves in some weird language that sounded very old , older than even English. "Sorry but can you guys not talk like that?" I was getting really annoyed. "Yeah sure!" Annabeth said. "So… how was your old American school?" I inquired. "Well we all focus on one branch of magic and then master it. Percy is mastering water. Nico does necromancy. I'm more of a combatant and strategist." She told me. Percy and Nico nodded in agreement. It was really different from Hogwarts. "Do you have different houses there?" I asked her. She paused then replied, "No, that way we all are really bonded. We do have different cabins to sleep in but other than that we do everything as a team. Do you have houses?" "Yes, w there are four: Gryffindor, Ravenclaw, Hufflepuff and Slytherin. Gryffindor for the brave. Ravenclaw for the smart. Hufflepuff for the Loyal and Slytherin for the cunning." I informed her. "Slytherin is like the evil house." Ron added. "You can't just label anyone like that!" Percy said. I was going to say something but then the compartment door slid open and in stepped the person I wanted to see the least: Draco Malfoy.

Draco's eyes sweeped across the room. "You're the exchange students aren't you?" he asked. "Yes and you are?" Annabeth replied. "Malfoy. Draco Malfoy." Draco smirked and held out his hand. "Jackson. Percy Jackson." Percy imitated him and smirked as well. Draco's smile faltered.

Nico POV

I had sent deep dreams to the man sitting next to us. I was going to dose off when the compartment door slid open.

In stepped a blonde guy with two thugs at his sides who introduced himself as Draco Malfoy. When Percy mocked him his smug look faltered and his goons cracked their knuckles as if to threaten us. I almost laughed. Almost. "Annabeth Chase." Annabeth said as if nothing had happened. I didn't speak. I wanted to see what would happen.

"And you are?" Draco asked me. "Nico."

I replied saying nothing more nothing less. I knew it would infuriate him. And it did but he stayed silent in order to avoid further embarrassment. Wise choice. "Blood status?" He asked his head held high. "Half blood" Annabeth replied. "All of you?" He asked. "Shame. I thought we could be friends." He added when Annabeth nodded. "What's wrong with being half blood?" Percy asked his face was a mask of confusion but his voice had a threatening edge. Apparently the Draco guy was dumber than I thought because he didn't see the threat. "Well it's just that my parents are much more important than your insignificant and useless parents." He replied and we started laughing. Percy fell down from his seat because of laughter. Malfoy was incredibly perplexed do he just left without a word.

As soon as he left the bushy haired girl - Hermione asked us ,"What's so funny?" "It's just … he said … insignificant … and useless!" Percy said between laughs. But then we stopped abruptly.

The train stopped. The temperature went down and I swear it wasn't me. Everyone was wearing scared expressions. The week I had spent in Tartarus came crashing back to me but then came the worst: Bianca. The times before the Lotus Casino. When we were together and happy. Bianca's face smiled down at me. She was wearing her favourite green hat and her long black silky dress.

I saw Annabeth wipe a tear. I knew what she was thinking about: Luke Castellan. I stood up to check what was wrong. But something beat me to it. I froze as the compartment door opened and I saw a tall black hooded figure glide inside. It stopped just in front of me. It's skeletal hands raised its hands to its hood when I finally came to my senses. I had never heard of this creature but I hoped my Underworld-y powers worked on it. It was worth a shot.

"Begone." I whispered to it trying to keep my voice calm. At the same time I released some fear aura of my own. Why? I don't know I guess I was hoping that it would feel threatened. To my surprise it backed up when someone behind me yelled, "Expecto Patronum!" A silvery light went past me and the creature went away.

I turned around to find the man - Professor Lupin awoken, a stick - no, his wand in his outstretched hand. That was when I noticed Harry sprawled on the floor. Hermione, Ron and Percy hauled Harry onto the seats. I stood in the corner hiding in the shadows. I realised that Lupin was a werewolf. How? I guess I had just gotten better at smelling monsters. I rubbed my arm where Lyncaon had dug his nails subconsciously. I looked up to see Lupin staring at me. "What?" I asked. "Oh it's just that I have never seen anyone so young stand up to a dementor and without a wand nonetheless." He explained. I didn't reply.

Harry groaned. Saved by Harry, I thought. "Who screamed?" He asked groggily. "No one screamed, Harry" Hermione informed him. Lupin handed him a piece of chocolate. "Eat, you'll feel better." Lupin told him before handing some pieces to us too. Everyone started nibbling on the candy except for me. It could be poisoned for all I know! I noticed that Harry wasn't eating either. "Nico" Annabeth started "How?" She asked and I shrugged. She gave me a You will explain later stare.

The rest of the train ride was silent and uneventful as everyone was still shaken, not like there was much of a ride left. Just before we reached we changed into our robes which is a very impractical dressing choice. When we reached, us, demigods followed a tall man (whom I am pretty sure is half giant) to the lake. We sat in little wooden boats three students in one boat.

I'm no architect like Annabeth but the castle took my breath away. (insert-Hogwarts-description-here). Annabeth was ranting about the architecture of the building but I wasn't listening.

_TIME SKIP TO THE SORTING BROUGHT TO YOU BY THE MCSHIZZLE MAN_

Harry POV

I sat down at the Gryffindor table with Ron and Hermione just in time to watch the first years and the exchange students walk in. The sorting hat burst into a song. (A/N I'm not writing the song. Sorry!) Then slowly the first years started getting sorted. After all the first years were done, Dumbledore stood up and informed us of the exchange students and the fact that they'll be joining the third years. After that, Professor McGonagall cleared her throat and called, "Chase, Annabeth" The blonde girl sat on the stool and the professor lowered the hat onto her head.

Annabeth POV

I was a but startled when the hat spoke to me. (A/N Annabeth's thoughts will be underlined as well as in Italics but the Sorting hat will be just Italics)

Hello, child of Athena. I haven't sorted a demigod in quite some time.

Excuse me but how exactly are you going to sort me?

I will go through your memories to find out which house would be the best for you.

Can we do it quickly? I don't want to go through it again.

Fine whatever.

All of my life flashed through my mind in a matter of seconds.

Ah, you have fought many battles. Gryffindor would suit you well but you won them with your wits so better be…

RAVENCLAW!" The hat yelled out to the hall.

I walked over to the students with blue ties and sat next to a girl who most people seemed to be avoiding.

Nico POV

"Di Angelo, Nico" the woman called my name and I strode over to the stool.

A child of Hades? Well, before you ask I'll sort you by going through your memories.

What? No!

I quickly put up mental barriers.

Oh how can I sort you if you don't let me see?

You'll be scared.

No I won't! Now take them down

I wouldn't dig so deep if I were you

I took the barriers. And I experienced all my life again in a matter of minutes.

When we got to Tartarus the hat started screaming.

Told you!

I said just before it was pulls off my head. "GRYFFINDOR! YOU ARE MOST WORTHY! HOW ARE YOU STILL SANE?" It screamed after me and I walked to the table with red in silence.

Percy POV

Everyone was shaken up from the Hat's wailing but I understood. Nico had gone through too much in an age too less.

"Jackson, Percy" the professor called.

Ok let's get this over with!

I jumped when the hat spoke.

Sure!

All my memories went through my mind and the hat stopped when we reached Tartarus.

No no need for me to see that place again! You are very brave Percy but you will fight any battle for your friends. Your fatal flaw is loyalty.

Thanks, I guess?

There is only one place for people who are loyal like you and that is…

HUFFLEPUFF!" The hat cried.

I was kinda bummed out about not being with Wise Girl but the students at my table looked more welcoming than others. So you know Pros and Cons.

Harry POV

Everyone in the entire hall was shocked when the hat screamed. The hat never does that. 'Most worthy'? What had this boy gone through?

I was scared when Percy put the hat on but nothing happened so I sighed with relief.

Nico had sat on the edge of the table, nearest the door.Dumbledore made a short welcoming speech and the finally the food appeared. Me and Ron piled food on our plate and I heard Hermione mutter something that shouted suspiciously like 'Boys'. I looked at Nico but he wasn't eating anything . I looked at Percy and he was looking around too. When looked at Annabeth, she was halfway to the Hufflepuff table carrying a jar of… was that green fire? I watched as Percy scraped part of his meal into the jar, muttered something and then started eating himself. Annabeth brought the jar to Nico. I elbowed Ron and then Hermione. Ron was horrified when he saw Nico scrape part of his meal into the fire and muttered "For…" something. I couldn't make out what he said. Ron and I gave Hermione confused looks who just told us, "If you have a problem then ask him!" So that's what we did. "Um… Nico?" I started nervously. "Yes?" He said, looking up from his plate. "Why did you burn that good food?" Ron asked. "Oh… that? It's a part of my religion." He replied.

After dinner, we followed the Gryffindor prefect to the dorms. To our surprise there weren't five beds but six. At the foot of the sixth was a black trunk.

I was going to check it out but Nico walked in before I could. He strode over to the bed, pulled the curtains and laid down. He pretended to be asleep but I could tell he was awake. I ignored and went to change.

For once I was having a dreamless sleep. But then I woke up because of a loud scream. I opened up the curtains of my four poster and saw the others already gathered around Nico's bed. "We aren't sure if we should wake him up or not." Ron explained. The American was curled into a ball mumbling something I couldn't make out. "Well we can't just let him be!" Neville voiced my thoughts. "But I'm not sure if he'll um… appreciate it." Dean argued. "Good Point."Seamus muttered. "I'm going to wake him up." I decided. My hand hovered over Nico's shoulder. I was about to shake him awake but he grabbed my wrist and glared at me. "Yes?" He said, his voice deadly calm but his eyes were glaring daggers at me. "You were… um… screaming so we didn't know what to do," I tried. He let go of my wrist and I scrambled back to my bed. Everyone was already in theirs pretending to be asleep.

A/N So how'd you like it? Please Follow Favourite and Review.

I was thinking about doing this other fanfic where Nico goes to the Grimmauld Place Number Twelve so should I do it or not?

Bye! I'll try to update quickly but no promises!