Soooo, this is my very first fanfiction! Yay! Hope you guys like it... btw, I accept any type of criticism, but I prefer constructive criticism.

I do not own Blue Exorcist or Harry Potter. Blue Exorcist is owned by Kazue Kato and Harry Potter by J.K Rowling. If you think that I own these, you guys are MENTAL!

Chapter One- Arrival

Lilly Potter was excited. Really excited. It was her first year at Hogwarts and she had just finished boarding the train and saying goodbye to her family. She was sharing a compartment with her two older brothers; James, the older one who is currently in his third year and Albus who is in his second year. She was always envious of them when they got on the Hogwarts Express, and when they come back for Christmas they have such a vast knowledge of spells, even though they aren't allowed to show her what they've learnt. But she knows that they know a lot just by looking at them. There were two other people in the compartment as well, her cousins Rose Weasley and Hugo Weasley. Hugo was the same age as Lily and Rose was the same age as Albus.

When the train left Rose and Albus started discussing the -once again- new Defence Against the Dark Arts teacher, who seems to be a new teacher each year mainly because something tragic happened to the teacher before. Some students believe that that spot has a jinx of some sort which is most likely true.

"I heard that the Ministry changed the curriculum for DADA." Albus said

"Wait what!? Do you mean I studied the whole of break for absolutely nothing!? How much have they changed it?" Rose obviously takes after Hermione.

"Not sure how much they changed it, but apparently we won't be learning spells anymore…"

"So it's the whole Umbridge thing all over again?"

"Who?"

"Umbridge. Oh! You wouldn't bloody understand mate! You don't pay attention when your parents tell you stories about when they were in school, bloody idiot!" Apparently Rose also has a bit of her father in her.

The compartment's door suddenly opened and an old looking witch with a trolley carrying tons of delicious goodies appeared. There were cauldron cakes, every flavour beans, chocolate frogs and loads of other wonderful creations.

"Anything from the Trolley, dears?" The old witch asked.

Lily, Hugo and even Rose stared at James with pouty faces, since he's the one with all the money. Although, Rose does have her own money… James couldn't ignore the pouty faces so he bought a whole lot of stuff.

"I finally got my dad!" yelled Lily after she opened her chocolate frog. The rest just sighed; they already had tons of cards with him on it, but for some strange reason Lilly would always got Dumbledore much to Albus's disappointment, since he never got Dumbledore. Rose and Albus went on to discussing the new DADA teacher again and what the new curriculum could possibly be. James soon joined in on the conversation while Hugo and Lilly decided to play exploding snap.

Eventually they arrived at Hogwarts and by the time they did it was already around six at night. The new students were greeted by a rather large man that Lilly could identify as Hagrid, one of her father's close friends. She remembered him visiting once when she was still a little girl. They had a family picnic that day in a muggle park and Hagrid got a lot of stares that day. Hagrid was telling all the first years to follow him; he took them to the rowing boats that would take them to the castle. Rose and Hugo got into a boat with two other kids. One was a blonde boy that looked like he couldn't stop smirking and some other kid that kept hiding its face. Lily couldn't quite see if the person was a boy or a girl. So she decided to stick with calling the person 'it'. After what felt like eternity the first years finally made it to the castle and were now all waiting outside the great hall. A plump looking witch was waiting outside of the great hall and she introduced herself as Professor Sprout.

"Before you enjoy the feast in the great hall you must all first be sorted into your houses; Hufflepuff, Ravenclaw, Gryffindor and Slytherin. These are the four houses, now you may enter the great hall." When they entered Lily was amazed at how big just one room could be. There were four massive tables arranged under what would seem to be the ceiling which seemed to be enchanted to look like the night sky. There were floating candles under the ceiling that lit up the hall. Further away she could see a long table where all the staff was sitting. There was a big chair in the middle of the table where an old looking witch wearing emerald green robes and a tall hat sat. Lily knew that that was the headmistress, Professor McGonagal. In front of the staff table was a podium and in front of the podium was a chair with a really worn out hat on top of it.

Professor Sprout seemed to have somehow gotten a scroll out of thin air and started to explain the rules and how they affect the house-points. Lily started to zone out when she did explain since she already knew the rules. Doing things against the school rules will result in losing points and triumphs earn you points and blah, blah, blah… Lily started to think about food because she was feeling hungry. She always seems to be hungry and never able to fully satisfy her stomach. Lily then started to wonder what type of they'll be serving, according to her brothers they serve all kinds of food. She then started to wonder where the food comes from, maybe from an enchanted jungle full of fairies and all sorts of interesting creatures that no one has ever seen before! But that would mean she has to eat all of those rare beauties. She then started to panic and wondered if she should consider not eating any food tonight. No! She couldn't possibly do that! Those rare animals died for the sake of her eating them! She cannot let them go to waste! After all, the deed is already done and there is nothing she can do about it anyway. Unless, she had a time machine that could prevent them from ever hunting the rare beauties. She had heard of many time machines, two of her personal favourites being a really stylish car that could fly and another that contained a madman. Come to think of it both contained madmen, but she was more focused on the handsome one wearing a bow tie.

"Lily! Lily!"

"Yes Doctor?" Lily replied in a rather dreamy voice.

"Huh?"

"Bow ties are cool Marty McFly!"

"Lily. You're daydreaming again." Said a rather familiar voice, it sounded like Hugo's voice…

"Oh. Have they called my name yet?" Lily said still sounding dreamy.

"Yes, they have."

Lily noticed that the whole hall was staring at her and her face suddenly turned a funny shade of pink. She slowly started walking to the chair that had the hat on it. As she walked she noticed a rather young guy sitting at the staff table, he wore square glasses and a long black jacket, his face was boyish and he had three moles on his face; two underneath his right eye and on the bottom left of his mouth. He had brown hair and teal coloured eyes and his skin was pretty pale, he looks like the type of person you'd expect to be carefree and relaxed, but he had a serious look on his face and that made him look older than she assumed he was. He was really handsome. She was so focused on the man that she didn't notice the stairs leading up to the chair. In short, she tripped over the stairs and landed smack bang on her face. The whole hall laughed at her, especially the Slytherlin table. She wondered if her brothers were also laughing at her. Lily thought quickly, she got up, turned around and stuck her tongue out and started laughing hysterically. The hall didn't quite know how to respond to that. As she sat down she noticed the young man and it looked like he was smiling at the whole situation. She also could've sworn that he just rolled his eyes at her.

That freaking jerk! I hate him!

When she sat down the old hat was placed on her head. Then the hat spoke to her.

'Very interesting…'

'What is?'

'Your mind…'

'What about it? And while we're at it, what the hell are YOU doing inside MY mind?!'

'Just seeing what house would suit your personality best.'

'Well. I wanna be in Hufflepuff! Put me in Hufflepuff unless you wanna die!'

'You're definitely not going to be in Hufflepuff with an attitude like that! Slytherin suits that personality of yours better than Hufflepuff would!'

'And why is that? Please, please, please, please tell me! I wanna know!'

'Then again you could easily go into Ravenclaw seeing as you have a thirst for knowledge.'

'I asked you a freaking question!'

'You are also quite brave. Maybe Gryffindor?'

'Look if you don't tell me why Slytherin suits me better than Hufflepuff, I will seriously injure you.'

'You wouldn't…'

'Watch me!'

Lily then rose her hands up to the old hat and started to strangle it. It was really quite the spectacle, a young girl with red hair sitting on a chair while strangling an overgrown shabby hat that was still on her head. The hall was too confused to understand this situation and simply stared for this was the first time ever a student decided to strangle the hat. Most of them had found the hat annoying, but none had ever thought of… strangling it. Somewhere in the hall her two brothers were trying their best to hide the fact that they were related to her while Hugo and Rose just face-palmed. Eventually Lily stopped strangling the hat, but now she had an annoyed look on her face.

'So hat… Will you tell me now?'

'I am inside your mind because it is the most efficient way to determine your personality and decide which house to put you in. Satisfied?'

'I actually completely forgot about that question, I meant the other one. The one about why Slyterin would suit me best. I am obviously a Hufflepuf!'

'Hufflepuff won't suit you because you have to be kind hearted and loyal. Although you are definitely kind hearted, you are not the most loyal. Slytherin would suit you better because you seem to be rather cunning and you also have an ambition to prove yourself because of your two older brothers always overtaking you.'

'Wow! You're good!'

'You also have a thirst for knowledge but you aren't necessarily the brightest. Your thirst for knowledge only usually comes after someone has said something that interests and you hate studying. You are a brave soul but can get cowardly at times.'

'So what house am I in already!?'

"SLYTHERIN!"

Lily was surely shocked when the hat said that. She expected to be in Hufflepuff or Gryffindor. She didn't know how her brothers would react or her parents. The Slytherin house cheered, but not very loudly since they aren't particularly happy about having a clumsy oaf in their house. As she walked down to the table she remembered her dad who said the year Albus went to Hogwarts that one of the bravest men he knew was in Slytherin. So it can't be that bad. Can it? After Lily sat down the next person was called. It was the blonde boy that couldn't stop smirking on the boat while on their way to the castle. His name was Scorpious Malfoy, son of Draco Malfoy, her father's arch enemy. She hated Scorpious already.

"Stupid, big, fat, pigheaded jerk! Oops… Did I say that out loud?" Lily exclaimed. Everyone stared at her once again for the umpteenth time that day. She decided to hide her face with her hair, not that it really did anything though…

"SLYTHERIN!"

As he made his way to the table Lily tried her best to give him a death-stare. It seems to have worked, however, Scorpious didn't know why on earth this loud-mouthed girl was giving him a death-stare. He tried to avoid sitting next to her but somehow he ended up sitting across from her. Great! Now she was probably going to kill him with a fork. Lily continued to death-stare at him. She continued to do so until she heard Hugo's name. As soon as his name was called she immediately stopped death-staring Malfoy.

"GRIFFINDOR!"

After Hugo they called the name of the other person that was in the boat. Haruki Otesanda was the person's name. Not really helping with whether it was a guy or a girl.

"HUFFLEPUFF!"

"I hate you! Oops… I didn't mean to say that out loud…"

This time no one even bothered to look at Lily as she said it, it seems they have gotten used to her sudden outbursts of randomness. Even though Lily was happy they weren't staring at her anymore, she couldn't help but feel slightly disappointed. She had to admit, she liked the attention she got. Eventually the sorting ceremony finished, and when it did, the headmistress stood up to make an announcement.

"Welcome first and welcome back all those who have come before! Now, before we begin the feast, I have several announcements I have to make. First of all, please give a warm welcome to our new Defence Against the Dark Arts teacher, Yukio Okumura!" As McGonagal said that, the young man that Lily was staring at earlier rose out of his seat and then he sat down again. "I also need to inform you that the Ministry has made a new curriculum for Defence Against the Dark Arts. This year, instead of learning how to defend yourselves against Dark Magic, you will learn how to defend yourselves against demons. The reason for that being, that there has been an increase in demonic activity in our world recently, and if not handled correctly, demons can kill you. You will learn more about this particular subject in class. Many of you are probably wondering what is to become of spells that help defend you from Dark Wizards. You will still study them. About one lesson every 3 weeks you will have a lesson based specifically on just that by a teacher who remains undecided still.

"Please remember, students, that the Dark Forest is strictly forbidden for anyone. Those who are caught wandering in the forest will be punished. Wandering around the halls at night is also strictly forbidden and will also lead to punishment. Now, with all that being said let the feast begin!"

As soon as the headmistress said that, all of the tables were suddenly filled with food. Lily looked suspiciously at the food to make sure that none of these were rare animals. Not that she would know or care. She then realised how starved she was, so she just grabbed a whole stack of whatever food she could find and started stuffing herself. In little less than a minute all the food on her plate was gone, she then went for another round and this cycle continued. Malfoy just stared at this girl as she ate, not even bothering with his own food. Then he started seeing it as a challenge, so he started stacking up his food. Lily saw that he challenged her so she started stacking up extra food onto her plate. After seeing this gesture he assumed that she had just accepted his challenge. They both continued to eat like cavemen and receiving quite a few stares -once again- from people. The staff had also noticed but decided not to do anything about it. Suddenly all the plates were cleared and all food gone from the table. Lily and Malfoy not being able to get what just happened just stared at their now clean plates.

Then dessert suddenly appeared before their eyes. Not taking any time to be amazed they started piling up dessert, obviously still not having completed their challenge. Not even looking at what they were grabbing they just started eating. Not even focusing on the taste of the dessert. By the time all the students started heading to their common rooms Lily and Malfoy weren't even sure who had won the challenge.

"I admire your eating skills." Lily said to Malfoy as they started heading towards the common room.

"I admire yours, I have never in my life seen a lady that ate like you do."

"Is that a compliment or an insult?"

"It was meant to be a compliment. It just came out weird."

"You do realise I still hate you, right?"

"Yes, yes I do."

"So then it's settled. From this day forth, we are rivals!"

"Gotcha!"

When they arrived at the common room, they couldn't wait to get into bed. Lily and Malfoy could only hope that they were well enough to go class tomorrow, what with all the food they ate. The first year girls were shown where their dorms were. Lily got a dorm with four other annoying looking girls. She decided then and there that she hated them. When she entered the room, she found her clothes on the bed. The scarves and ties all had Slytherin colours on them. Good thing she liked green. When she got in bed she wondered what Hugo was doing right now. He was probably sleeping by now. She wondered if they could still be friends even though they were in different houses. She could only hope, Hugo was her closest friend and has been ever since they were little. She was born a day after Hugo and they always shared a birthday party. They know almost everything about each other, one could almost swear that they were twins. But they weren't, and they never will be.