Demons and Magic don't Mix Chapter 1: The letters that condemn a demon’s soul, a Harry Potter + Yu Yu Hakusho Crossover fanfic

This is a REWRITE of the first three possibly four chapters, as the first three were written when I was a lot younger and my writing style (as well as character preferences) have changed.

Also did a bit of research, and Mozaku is a type of elite demon according to YYH wiki, so, I've had some major editing to do. Also learned the proper spelling for a lot of characters. Also got reference pics! :)

Quick summery of the Character changes:

Yusuke: Is Toshin Rico, Demon criminal. While he acts like Yusuke, his mind is sharper and he is quicker on the uptake. His spell while the same as Kurama's, had been effected by the blood of his body being a scion of Raizen, as such he and the body he was in merged together well to the point there is no 'switch' between him and his demon form. (High S-class)

Kurama: Can change into Youko Kurama. His Mother is a muggle and his Step-father is a Demon hunter for the ministry of magic. Also his step-brother is going to start his first year at Hogwarts. Hates wizards, especially wizard hunters. His step-father was one of the hunters involved in the demon hunts in Japan 17 years ago. (High S-class)

Hiei: He has gotten some what less closed but is still the silent deadly type. Is planning on telling Yukina about him being her brother. (High S-class)

Kuwabara: He is currently studying to enter university, and finds the whole wizard business odd at best. In the manga/anime, his parents are referred too, but not enough information on them so I can do a bit of twisting with that. (Barely S-class, confirmed this on YYH wiki)

Koenma: Is a decent (S-Class) fighter and is also very OOC in this. More evil especially to George the blue ogre and less whiney. Is also half demon, half spirit person due to having a demon mother.

I'll refer to Yusuke in human form as Yusuke and Rico when he's in Demon form. Same with Kurama. (Youko in demon and Kurama/Shuuichi in human) Side note: Also Koenma and Botan call Yusuke, Rico like they call Kurama, Kurama rather than Shuuichi but Koenma will call them Shuuichi and Yusuke while on the mission.

Side Side note: Got the proper spelling of Kurama's human name (as well as his brother) and its gonna be a pain to tell the two apart. Therefore, Shuuichi is Kurama and Shuichi is his stepbrother.

OK, I KNOW CAPS ARE AWFUL, BUT JUST TO MAKE IT CLEAR ONE LAST TIME, THIS CHAPTER, HAS BEEN REWRITTEN. ALL CHAPTERS THAT ARE REWRITTEN WILL BE INDICATED AT THE START. SO IF YOU SEE AN UPDATE, BUT NO NEW CHAPTER, CHECK BACK ON THE PREVIOUS CHAPTERS. Thank you.

Kurama: Well since Dragon forgot to actually do say the disclaimer I guess I will to save a lot of lawyer bloodshed. Dragonzz89 does NOT own any of the Harry Potter characters. Nor does she own the Yu Yu Hakusho characters, if she did there would be chaos.

Chapter 1: The letters that condemn a demon's soul

Yusuke or rather Rico was starting to doze off in class. For you see when he regained his memories he also regained his smarts. Not a smart as Kurama (he was pretty sure no one was as smart as Kurama) but pretty smart, enough that he could doze on in lessons he deemed to be useless to him, despite Keiko's protests.

Boy did his school get a shock, not only had Yusuke's intelligence increase by overwhelming proportions he did it in all but a day, seeing as before he had been an E-average student. Now it was strange for him to get a B. Keiko had been shocked (but that still didn't stop her from scolding him) as was Kuwabara (but he learned to accept it as a quirk that came with regaining a lifetime of memories). Hiei and Kurama on the other hand were not as they had heard that Rico was smart and sly, even if Kurama was smarter and slyer, and wasn't in the lease bit surprised when they found Yusuke's intellect to grow overwhelmingly.

Yusuke on the other hand had many, many things to catch up on. First, there was his old buddy Youko. Before the whole being injured thing, he and Youko had been partners on several occasions and had gotten to know each other. Hiei on the other hand stopped calling Yusuke a 'baka ningen' as an insult, as technically it wasn't true anymore, though that didn't stop the hellion from teasing him. There was also the problem of Raizen.

With a lot of talk and even more fists he had finally managed to force 'his stupid old man' out of whatever funk he had decided to fall into, as apparently, the loss of his pseudo wife and rebel son had taken its toll on the old demon, despite said demon being one who took great amusement in humiliating those around him.

Begging Kurama's help, he had researched the sustenance that human flesh gave, and with a bit of connections, back alley dealing, and even more begging, this time his mother's help, Yusuke turned up at Raizen's palace, with a bottle of pills, and instructions on making the stubborn demon take them all.

Raizen soon regained his power. Muroko was delighted as it meant that Yomi couldn't attack her area anymore without having to deal with Raizen as well. With the balance of power between the three restored, the 'demon lords' war' was ended but not without a Demon tournament just for the heck of it. Guess who won? Raizen of course, as a way of celebrating his return to a healthy state (I'll get you one of these days-Rico).

And so the day starts with the gang being attacked with owls.

Yusuke stretched as he walked out of Algebra. He had dozed off in class only to be woken again.

- Flashback-

"Today we will be looking at hyperbolic, the main three being Sinh, Cosh and Tanh… " the teacher explained to the class. Most of them paid very close attention to this however one person didn't. Yusuke Urameshi or Rico Toshin as he is known to his demon pals was fast asleep on his desk. The teacher as usual decided to pick on him.

"Mr. Urameshi please answer the question on the board," he said slamming Yusuke's desk in the process. Yusuke said nothing simply got up, walked to the front of the classroom and wrote out the answer and working to the entire equation without batting an eyelid before going back to sleep on his desk.

The classroom was silent.

The teacher gapped and the students stared. Yusuke had increased intellect in English, Science, Japanese history and basically every other subject, now algebra? This was a little too much to handle, was this even Yusuke?

Only Kuwabara knew Yusuke was smart because he knew he was Rico. You see it was a clever plan. Act like the exact opposite of Rico and fool everybody. Unfortunately for Rico, he was just too smart for his own good. He lost his memories so he could act the part better. His blood was supposed to activate when he was 10 but something went wrong and instead it didn't activate until he was stronger than the spell.

It was found out that the whole reason it had failed, not because he had messed up, was because of the body he had inhabited. How was he support to know that of all the bloodlines he could have been born into, it was the scion of the Toshin, the descendant of ironically, himself? The awakening demon blood due to his interference instead of merely placing his soul into the body had merged the two together, meaning Rico had become Yusuke and Yusuke, Rico. When he realized this, he had laughed at his own damned luck and karma, just before going off to save his friends.

The merge meant that Yusuke was still Yusuke, but Kurama and Hiei welcomed the change in him, going from reckless hardheaded hothead idiot to slightly less reckless, levelheaded daredevil. Genkai had once commented on how even after gaining back a brain, he still was a dimwit, though Yusuke had only smile-smirked at her, knowing eyes glittering.

-End Flashback-

So Yusuke decided to head outside to eat for a change seeing as it was a nice day. Finding a nice spot under the tree he pulled out his lunch which was two sandwiches, a packet of salt and vinegar flavored crisps and his ever trusty coffee flask. Memories or no memories, this was food or in this case drink, for gods and demons alike.

Raizen had sent him a message earlier that day, but he had been too tired to care to read it properly. Pulling it out now, he skimmed it, noting the concern on how he was fairing in the human world, his human mother and the current state of demon politics, as crude and blunt as they were. The postscript on the other hand, made him wonder if his dear old dad had really gone loopy in the years he had been gone from the palace tower.

Watch for owls? Yusuke thought with a sweatdrop. Either his father was going crazy or it was going to be another mission. You see like Kurama and Hiei as soon as he was found to be Rico he was put on probation, not that he wasn't going to be on probation anyways, being a scion and all. So unless he wanted to go to jail for the next thousand years or so, he was to put it lightly forced to work for Koenma. Speaking of Koenma he had ditched the toddler look. Now whenever they entered the room Koenma was in his human teen form. At least Koenma had been kind (and smart) enough to pay his spirit team a decent wage.

Yusuke sighed before sitting down to eat lunch. They were made by Keiko today, he noted it because it didn't have the scent of alcohol all over it, and even had the ramen smell from Keiko's family shop. He loved Keiko's lunches, simple and easy to make yet full of care and love. Keiko would make a good wife someday, and he couldn't wait to act the overprotective big brother figure to whoever her intended would be.

That was when the owl decided to attack.

Flapping down it landed on Yusuke's head. Yusuke didn't gel his hair anymore, there was just too much to gel, every time he used his demon energy his hair would grow in typical Toshin fashion and after the fourth time Koenma had reached his limit and told him to just leave it that length, meaning he now had hair that reached his lower back, tied in typical Uchiha Itachi fashion, leaving his front bangs to droop around his face, where they had grown so long that they could no longer defy gravity.

Looking up at the bird in an annoyance Yusuke tried to get it out of his hair, which tangled stupidly easily, not because it wasn't gelled up. He would never understand the vain fox and his perfect hair. So Raizen wasn't kidding about the whole owl thing he thought. Well if he was going to be interrupted he might as well finish his lunch.

The owl who had gotten annoyed it was being ignored started pecking Yusuke. "O.k. O.k. I'll take whatever you have for me then." Yusuke snapped anger evident in his voice. The owl hooted before lifting a leg to show a letter tied to its leg. Yusuke took it as the bird flapped away. He looked at the letter eyeing the address. It read:

Mr. Yusuke Urameshi

Under the tree in Sarayashiki Junior High School Yard

Tokyo

Japan

Yusuke sweat dropped before opening the letter. It was written in green spidery ink.

Dear Mr. Urameshi

You are hereby formally invited to Hogwarts School of witchcraft and wizardry to represent Genkai's temple of arts, Japan. The term starts on 1st of September where you will depart from platform 9 ¾ at exactly 11am. You will be starting in the fifth year. We have supplied an equipments list and await your owl no longer then 28th of august.

Signed Professor McGonagall

Deputy headmistress

Yusuke looked at the letter with a kind of rage. The only thing that indicated he was mad was the look in his eyes and his hand was shaking in anger. How dare they! After what they did how dare they! Looking at his watch he figured he had enough time to get to Kurama's school and back. Packing up everything he headed for Meioh Private Academy.

Hiei was sitting in a tree on Genkai's land when it happened. He was training and had stopped for lunch. He had some sandwiches but for some reason he had a craving for roast bird. Didn't matter which bird just a bird. It was at this time that the poor unfortunate owl chosen to deliver Hiei's letter flew down. Landing on Hiei's head it dropped the letter. Hiei smirked at his fortune. Looks like I'll be able to have roast bird after all he thought. Hiei slashed the owl in a swift movement that was invisible to the naked eye. The owl didn't know what hit him and died in a pool of its own blood.

Hiei plucked the feathers before roasting it. While eating he looked at what the bird had dropped. It was an envelope addressed to him. It said:

Mr. Jaganshi

The second tree from the opening

Genkai's land

Japan

Hiei blinked. Opening it he read:

Dear Mr. Jaganshi

Signed Professor McGonagall

Deputy headmistress

Hiei blinked at the letter before thinking about it. What kind of fool would send me a letter about a baka ningen school for god be damned wizards? A person that doesn't want to live by the likes of it. Better see if the others have got these before I kill of the idiot who thought up this stupid prank.

With that thought he headed for Sarayashiki Junior High School determined to get some answers.

_:-(_

Kuwabara was having a semi-normal day considering Yusuke had got the sum right in algebra (he had expected Rico to have no idea about algebra, come on, it didn't even exist when Rico had been born!) and had gone from an E average to an A practically overnight. It took some getting used to but after he did it was rather normal. It was strange to see Yusuke without his hair gelled up anymore but he looked fine with his hair down and tied up. After 4th period Kuwabara had headed for the roof because he felt like sitting there for some reason and so had started eating lunch with the guys there. It was then that the owl prepared the attack.

Diving in it landed like an arrow right in Kuwabara's hair. It was an amusing sight, seeing an owl stick out of Kuwabara's hair in an arrow shape. Kuwabara pulled it out glaring at it at the same time before taking what was tied to its leg. The owls puffed angrily after it was released and flew away but Kuwabara could have sworn that it stuck its tongue out at his. He looked down at the letter. It said:

Mr. Kuwabara

The roof on top of Sarayashiki Junior High School

Tokyo

Japan

Kuwabara blinked at the writing, not knowing what it said as his English was one of his worst subjects. Keiko was good with this stuff, he'll ask her. "Guys, I have to go find Keiko, she knows how to read this," with that Kuwabara sped off to find Keiko.

_Break_

Keiko, before the whole spirit detective business, had been content with her life, as dull and non-amusing as it had been, the occasional spark that Yusuke caused being her only form of entertainment. During Yusuke's training into becoming a fine spirit detective, Keiko had gone from bored dull schoolgirl to human assistant to Spirit worlds current finest agents. Life was looking up.

It had been in the time Yusuke was gone, did Keiko finally get round to reading into her feeling for him. When they had been young, she had thought him as fun, not like the boring unimpressionable people in her life and he had that spark that seemed to make her smile turn into a sly smirk. As she grew, that feeling had grown, till she wasn't sure what it was anymore. She had thought at once point, it had been love, and during his time as a Spirit detective, that feeling had grown.

It was only during the Dark Tournament, with Yusuke in her lap while he slept, did she stray from crush to loving sibling. It was during the last few days of the Dark Tournament, when she noticed Yusuke's friends, and those around him, did she feel truly happy. Her Yusuke, loner, delinquent and all round mean kid, was growing up. She was glad, and during the time he was gone, two months, three years in the demon world, that she accepted that she didn't feel for Yusuke in the romantic sense. After confessing that to Yusuke, he had smiled, pulled her into a hug and said she would always be like a sister to him too, and they had hugged for a long time, both having lots to catch up on, Yusuke and Rico being one of them.

It was a struggle to adapt to the new Yusuke, one who was Yusuke, so much like Yusuke, but at the same time wasn't, but she handled it, because with Yusuke, life wasn't that dull grinding day in day out routine and for that she would always be grateful. She just wished Yusuke would stop scaring away any boy who got within 20 feet of her. Her father had approved wholeheartedly, and with the condition that they had to be able to beat Yusuke in a fight, the chances of her ever finding a boyfriend, let alone someone she would've liked to settle down with, were looking slim.

It was at that moment, where she was still in her moment of lament, that Kuwabara entered the classroom, letter in hand, heading for her.

"Keiko, hey Keiko! Do me a favor?" he asked, heading over to her, and sitting down on a chair he pulled over. "Sure, what do you need?" she asked, looking up at him, because no matter how much she grew, Kuwabara still towered over her.

"Some crazy owl from absolutely nowhere decides to attack me, before dropping some letter on my lap and flying off. It's in English too, and I got what some of the words mean but stuff like 'Hogwarts' and 'Wizards' make no sense to me. Was hoping you could take a look for me,"

"Oh sure, but my English skills aren't like Kurama's, there's probably some stuff I don't know either," Keiko said, taking the letter and skimming it over. "Now that's weird…" she muttered, more to herself then to anyone specific.

"Ah, I see you got the stupid ningen letter about a stupid ningen magic school too," a voice from nowhere spoke suddenly, starting Keiko, thought Kuwabara had sensed him coming. "Magic School?" he cried, looking at Hiei like the fire demon had just set up flashing neon words over himself that screamed 'crazy person here'.

"That's what I said, baka, is your brain to slow to even understand the basic sentences?" Hiei snorted, before turning to Keiko. "Read the letter out, onna, so the baka understands the situation,"

Keiko glared slightly at being called onna, but otherwise let it drop, reading out the entire invitation letter.

Dear Mr. Kuwabara

Signed Professor McGonagall

Deputy headmistress

At this, Keiko pulled out another r list, this time listing the equipment needed. "This is either a very elaborate prank, or so weird it might be real," she muttered, staring wide eyed at the equipment list.

"What's it say?" Kuwabara asked, indicating the list. "They have such strange equipment, I mean who wears robes to a school, and pewter cauldrons? It's like the stuff right out of fairytales," Keiko said in fascination, not believing the amount of items listed.

"It's real alright, baka wizards, the lot of them, they're trash and filth that I wouldn't associate with normally," Hiei said, looking like even the word made him want to spit out the foul word. Keiko and Kuwabara were surprised, Hiei had never talked about anything with such hatred, unless it was some threat to Yukina (Keiko had often wondered how Kuwabara STILL hadn't figured it out yet). These wizards must have done something, to make the fire demon burn with such anger.

"Come baka, we must find the fox and the detective," Hiei said, casually jumping out the window he had entered from, with Kuwabara following closely behind, also jumping from the window, and Keiko, who unlike those didn't have such an ability, running down to grab her bike, because there was only one place Kurama would be at, his own school.

_:-)_

Kurama was having a usual school day. Go to class, read his books, get away from fan girls, eat lunch, more lessons and so on. It was during lunch that strange things started happening. After managing to escape the fangirls he settled down to eat, even if it meant eating sat in a tree. I wonder if Rico has this problem at school now that he's changed his look Kurama thought. It was true that Yusuke's look had changed. He kept his green school suit, it was common knowledge that Rico and Yusuke's favorite colour was green, and not even the circumstances in which he died would change that. But ever since his blood fully awakened, his hair had stopped following normal human rules and started messing around in Toshin fashion.

Due to having far too much hair to gel, Yusuke had admitted defeat and just left it in a pony tail, and letting his bangs fall around his face. Yusuke at once point, had also adopted the look of wearing a headband to hold some of his hair back, so that it didn't just fall in front of his face, meaning that instead of tendrils of messy hair all over the place, he had tendrils of messy hair that parted to two sides. It was still messy, but it didn't get in his face anymore.

As Yusuke found out the hard was, his new look meant girls were now chasing him, because delinquents were nono's for the average sensible girl, but Yusuke wasn't just a delinquent thug anymore, he was a hot badass, and the girls loved a hot badass, almost as much as polite prince like gentlemen. It didn't help that his fangirls and Yusuke's joined teams on more than one occasion.

Kurama sighed. No matter what anybody said, he'd rather face all three demon lords at once then get caught by fangirls. Fangirls were his worst nightmare and probably Yusuke's as well. Most demons would have laughed if they heard that the great Youko Kurama was spooked by a couple if human girls. They would be as well if they faced banshees in large groups.

And as if on cue there was a huge shriek of "SHUUICHI-SAN, WE LOVE YOU," from the girls who had found him. Oh no Kurama thought they found me. "Hello girls," Kurama said with a pleasant smile before jumping out of his tree, and running like mad.

Increasing his speed, he headed for the school with a polite pardon; after all why tarnish the polite look. It was at this time that he was saved by Yusuke. He ran towards him, grabbed his arm as he ran past and dragged him off. The fangirls watched as their 'true love' was dragged away with their sister fanclub's 'true love'.

The leader, a girl called Sakura, pulled out a mobile before dialing the number of Ryoko Kunachi, leader of the Yusuke fan club. "Hey there Ryoko," Sakura said. "Code Blue, I repeat Code Blue," In a matter of seconds the fans of Yusuke were down at Kurama's school. "Let's go," Ryoko cried and they headed towards the area Kurama and Yusuke headed in. How they beat Keiko there, despite not being on any form of transport other than their own legs, was still a mystery.

Kurama and Yusuke watched as the fangirls ran off before leaving their hiding spot of in the tree. "Thanks, Rico. I owe you one," Kurama said to Yusuke, glad that he had avoided the fangirls. If there was one thing Kurama hate it was fangirls and the occasional fanboy.

Just yesterday a very fat stumpy girl, the same age as him, who was even shorter then Hiei had asked him to be her lab partner. Kurama had declined the girl with the excuse that he already had a lab partner. Now she and a whole bunch of other girls were after his lab partner which luckily NOT a fangirl, wasn't interested in him in any romantic sense, and had just partnered with him for the good grade she knew he was going to produce, even if she imputed nothing what so ever.

That girl would give him nightmares for weeks, he thought with a shudder. No surprise there as the girl who was not only fat and stumpy, she also had huge lips, a large nose and an obsession with the fact that she was prettier than others. Not only that she wouldn't stop eating half the time and also had a habit of trying to look cute by making cute sounds which only made all that more repulsive (I based it on Emokis from Marchen Awakens Romance). Kurama shuddered at the thought.

It was then that an owl landed beside Kurama before sticking up its leg which had a letter tied to it. Taking the letter he read:

Mr. Minamino

Meioh Private Academy courtyard

Tokyo

Japan

Kurama sent Yusuke a weird look. "Open it," was Yusuke's explanation. Kurama looked at Yusuke again before breaking the seal and reading:

Dear Mr. Minamino

Signed Professor McGonagall

Deputy headmistress

Kurama's eyes widened in recognition "The people who caused my…," Kurama said crunching the letter up. Yusuke simply nodded. "We have to see if Hiei and Kuwabara got this or not." Kurama said to Yusuke. "Let's get Kuwabara first," Yusuke said and they headed for Yusuke's school.

_:-)_

Kuwabara had finally caught up with Hiei, who was currently leisurely walking along a high wall, looking completely at home, and leaving Kuwabara to wonder how no one had noticed him yet. Keiko caught up a while later, being on bike making it easier for her to reach them. "Yusuke wasn't at school, so I think he might have got a letter and headed for Kurama's school," she said, slowing down so that she was riding at a more leisurely pace next to them. "Well, hopefully we'll find them soon," Hiei muttered, just as he caught a flash of magenta.

As if on cue Yusuke and Kurama came into view, having been heading in Yusuke and Kuwabara's school direction.

"Hiei, we were looking for you. Good thing you're here." Kurama said.

"Same here," Hiei said.

"Do you know what's up with getting one of these?" Yusuke, Kurama, Hiei and Kuwabara asked at the same time whilst holding up there own letter.

"Well, I can safely say we have no clue what this is about." Kuwabara said to the others.

"Not necessarily," Kurama stated. "We know about the wizarding world, however we don't have much idea about this school," Yusuke explained.

"At least it proves it's not a prank," Keiko offered.

"It does say we would be representing Genkai's temple of arts so I'm assuming we should see Genkai about this matter," Hiei said.

"Great, we can meet there after school then." Kuwabara said. "Sure, I'll call mother and tell her I'll be late then," Kurama said, and started heading back to his own school.

"Ah, I got to help out at the store today, so I can't come, but tell Genkai I said hi," Keiko said, before she, Kuwabara and Yusuke headed back to their school.

Hiei, with nothing to do went back to finishing lunch and many delicious roast birds. All were caught up in their thoughts about the school.

_:-(_

Meanwhile…

_:-(_

Dumbledore sat staring at the letter of rejection with a rather troubled look on his face. He had just received the reply from the famous psychic Genkai and it wasn't the answer he was expecting. He had been rejected, flat out rejected in fact.

The letter had contained only five words.

No way in hell

Genkai

Where was he going to find a DADA such short notice? He, with the governments help had managed to get Raizan, Muruko and Yomi to teach DAD (oh, he loved the irony of that) but Genkai wasn't an easy person to bribe/blackmail, a person with not many bonds was truly a hard person to manipulate. The threat of an all out war with the demon world had meant that for now, the three lords would have to abide by his rules, for while they themselves were strong, the same couldn't be said for the demons under their command, but Genkai was no easy person to pin down, and there wasn't a lot that could move that woman to act.

That's when he looked over the application for Dolores Umbridge again. It was looking better and better. Finally giving in he picked up a piece of parchment and a quill before sending his reply to Umbridge. Yep, at that moment, Dumbledore was one desperate man. It was a side that most people didn't see for if they did they would see that if he was forced into a choice that did more bad then good, he would take it.

Tom Marvelo Riddle had seen this and given the choice he made an organization determined to knock Dumbledore of his throne. Too long, the Light had reigned supreme, branding anything Dark as evil and untrustworthy. Too bad Dumbledore had twisted it into a tainted dream, evil in the eyes of the wizarding community.

Finally first chapter Rewritten!

The rewrites might mean there is less content to read then before, but that's because I changed some stuff hugely. How I write Keiko for example is one of them.