Hogwarts' New Apprentices
by gyhardin

Summary: YYH/Harry Potter Xover. Voldemort was vanquished on the Samhain of Harry's 7th year in Hogwarts. However, the Dark Lord is back and he's stronger than before. Unfortunately for him, he did something that called on the most powerful tantei team in Reikai to bring him down once and for all.

A/N: This story starts two years after the end of YYH TV series and after the OotP book of Harry Potter (obviously). This is non-yaoi. There will probably be a bit of romance on latter chapters. Pairings are canon & non-canon. Translation of Japanese words and other explanations will be found at the end of each chapter.

Disclaimer: I don't own YYH and Harry Potter. We all know who own them. Mine is just the story plot.

Chapter 1: Death and Breakout in Reikai

Flurries of blue, marsh green, and orange oni were moving to and fro in the busy offices of the Reikai Palace. The whole floor was dotted with many cubbies and tables where onis were taking calls and doing paperwork. A harried shout could be heard from the main office of the prince of Reikai calling for George, his trusty blue assistant. George was a yellow-haired, blue-skinned oni with pointed ears, fangs, and horn on top of his head. He was browless and pug-nosed who wore a yellow & black tiger-print loincloth and went around walking barefoot.

He immediately extracted himself from his paperwork and left his cubicle to attend to the prince. "I'm here, Koenma-sama." George skidded to a halt in front of the prince's table, breathing heavily.

He faced the adorable looking toddler prince who was sucking on a blue pacifier. Koenma, who was half a millennium old, had a "Jr" on the rim of his blue dome-like hat. He wore his usual pink-cuffed blue tunic that was tied with a red sash around the waist over plain yellow ochre clownish pants in his toddler form.

"Where is Botan? This is urgent. I want her here NOW!" the small prince slammed his fist on the desk, his face twisted in a scowl.

"Gomen nasai, Koenma-sama. Botan has gone to Ningenkai to ferry a spirit here. She left a few minutes ago," the blue oni cringed and hurriedly explained.

"Dispatch another girl to take over her duty and give her this note. Make sure that the girl tells Botan to read this at once," he scribbled a note and handed it over to George, "before she comes back here. Don't take long; I need you to be back here ASAP. There are more directives I need to leave with you before I go to Makai."

"It shall be done at once, your highness!" George saluted and hastened to do the prince's bidding. It only took him a minute to do it, so he immediately returned to Koenma's side.

"Good, you're back," mumbled Koenma as soon as he noticed the oni's return. "I have to go to Makai to talk to Mukuro." Koenma informed George while rummaging through a pile of papers to get some documents he needed to bring with him. As soon as he gathered the papers in a folder, Koenma took on his adult form. Gone was his comical hat, instead, the "Jr" letters were now on his forehead with his brown bangs not long enough to cover them up. He now looked to be in his twenties wearing a blue sleeveless Chinese robe over his white long-sleeved tunic and ochre slacks with a red sash around his waist, a red cape and black leather shoes.

"Botan will be here in a short while with Yuusuke, Kuwabara and Kurama. I want you to stay here in my office and wait for them to arrive. Tell them I'll be along shortly, hopefully with Hiei in tow. Make them wait for me and inform them that I have an urgent mission for them. This is one mission that will need all four of them together. But this time, Botan will be joining them, he told George.

"Hai, Koenma-sama! They'll be here upon your return." assured George as Koenma tucked the folder in his side and strode to the exit. "Please be careful, sir." He added under his breath. Makai, the demon world, was a highly dangerously place and he knew that his master was no fighter.

oo

In Ningenkai, in a non-descript small apartment in suburban Tokyo, Botan could be seen approaching the spirit of an elderly woman who was hovering over her dead body. Botan was about to introduce herself when she heard an indistinct shout coming from outside. She went out the door, craned her neck high and squinted her eyes against the glare of the sun to see a black dot in the distance that was rapidly taking shape as it neared her. She realized that it was another ferry girl on an oar that was yelling for her. It was Ayame and she was zooming straight for her.

"Good thing I caught up with you!" panted Ayame as she slowed down to a stop in front of Botan. "I have an urgent message for you from George and that I'm supposed to take over your duty today." She took out a note from her pocket and handed it over to Botan. "George said that this is from Koenma-sama. You are supposed to read this first before you head back to Reikai."

"Arigatou, Ayame-san." Botan accepted the folded note and read it at once. After she read the note twice, she looked back up at Ayame and asked, "Where is Koenma-sama? Why didn't he just use the communicator like he usually does when he needs the gang?"

"I have no idea but I surmise that it had something to do with what happened yesterday. However, he's not in Reikai right now. I heard from George that he was in a hurry to go to Makai, said something about Mukuro and Hiei-san." Ayame shrugged her shoulders.

"What happened yesterday? I was so busy for the last 3 days with all the spirits I had to ferry over that the days went by me like a blur." Botan queried, peaked with curiosity.

"Can't talk now!" Ayame shooed away the blue-haired deity. "George kept on stressing that this is urgent and that you have to comply at once to what the note has instructed. So go now and do what you have to do. I think Koenma-sama will be expecting you to be there before he gets back from Makai."

"Hai, hai! I'm going." Botan took out her oar and hopped onto it hovering a few feet off the ground. "I'd better get Kurama first. He's a lot closer here than the other two." She mumbled while looking around, re-orienting herself with the city's layout. She looked back at Ayame and called out, "Okay, I'll be going now! Ja ne, Ayame-san." She waved at Ayame then headed for Tokyo University.

A bell rang as she reached the Hongo Campus, signaling the time for lunch. 'Good thing, I got here at this hour. Kurama will not be in class right now,' she muttered to herself. She landed at a shadowed corner of a U-shaped building and transformed her pink kimono into a modern outfit of blue denim Capri pants and yellow ruffled gypsy blouse. She made herself a fake ID and left it hanging on a string around her neck. She needed to pass up as a student there to home in on Kurama's reiki. She hurriedly went inside the building, passed through a bookstore and an indoor pool before she found the cafeteria where she felt his reiki.

Kurama, better known by his human family, friends and acquaintances as Minamino Shuuichi, was in his second year as an undergraduate of Bachelor of Science in Biological Sciences taking up Botany. His affinity to plants made him decide on taking it up in college. The Department of Science was located in the Hongo Campus of Tokyo University. He usually went to the old building of the Faculty of Science for his classes, which was just the inverted U-shaped building behind the one where the cafeteria was located. So it was a short distance for him to travel to have his lunch after he stowed his things in his locker.

The distinct long red hair of Kurama could be seen above the varied colored-hair of women surrounding him. "Hi, Shuuichi-kun!" waved Botan to him, making her way over to where he was sitting.

Kurama whipped his head to the entrance of the cafeteria as soon as he heard his name. An audible sigh of relief was heard by all of his fangirls when he saw the owner of the voice who called him. "Ah Botan, am I glad to see you." He pushed his seat from the table, stood up, lifted his tray and met her halfway. Kurama, with his handsome looks and silky long red hair, was looking quite gorgeous wearing a white zip-front sleeveless vest with hood and kangaroo pocket detail over a dark gray long-sleeved acrylic v-neck top with contrasting shoulder panels, black slacks and black loafers.

"Come on, let's get out of here. I'm done with lunch and I definitely need a breath of fresh air." He took hold of Botan's elbow and steered her towards the glass door. On their way out, he dumped the contents of his tray in the trash bin and stacked the tray on the piled trays on the table near the exit.

Botan could feel the ominous stares of Kurama's fangirls on her back. She looked back over her shoulder and there they were, glaring evilly at her. She woodenly turned her head up front then looked at Kurama. His face had a fierce look and his eyes, when he took a glance at her, had a golden tint in them. Seemed like even the Youko was annoyed with the incessant flock of fangirls following him. When they got out of the cafeteria, she looked back again and saw that the girls were slinking slowly toward them, trying to listen in on their conversation.

"Don't look now, Kurama, but I think we are being followed," she whispered to him and pointed behind them.

"Kisama!" Kurama hissed under his breath. He dropped Botan's elbow, took her hand and pulled her along at a quick pace. "We'd better get out of here in a hurry." He started to hasten his brisk pace into a run when he saw his persistent fan club scurrying after them from his peripheral vision. He was beginning to get really pissed when he noticed the girls going at a full run to keep up with them, so he let go of her hand, swept her off her feet and carried her in bridal fashion. His run became a lope as he headed for the milling students hoping to loose his tail in the crowd.

After ten minutes of continuous running and hiding, Botan looked over his shoulders and saw that they finally were able to evade his fans. She noticed that they actually went through 2 buildings just avoid them. They were now hiding behind the University Press building. "I think we're safe now, Kurama-kun. You can put me down now." She patted him gently on his chest.

He looked at her and heaved a huge sigh of relief. His tensed shoulders sagged, let her go and dropped her back on her feet.

"I thought you'd be used to your fan club by now, Kurama-kun?" she whispered teasingly, giggled quietly and nudged him on the side.

Kurama grimaced, "I think I have just reached my saturation point in all of this. Not even one intelligent conversation from any of them. I know a lot of them were smart, because I have seen some of them interact actively in class. But whenever they get close to me, it's like they have this switch on their brains, they turn it off and become complete idiots." He whined in annoyance as he placed his right arm around her shoulders in an almost choking hold. "I really hope you're here take me away from all this today," he looked down at her pleadingly.

Well, you're in luck. I'm actually here to take you to Reikai. In fact, we really should be going now. She ducked under his hold, pulled his arm and dragged him to a shadowed corner for privacy. Koenma-sama expects us to be there when he gets back from Makai, she told him as she changed back into her kimono. She pulled out her oar, sat sideways, waited for him to settle next to her, and then soared into the sky. We'll have to pickup Yuusuke and Kuwabara before we proceed to Reikai, she shouted over her shoulder to Kurama.

Kurama hanged on as Botan soared high to pinpoint Hosei University where the remaining tantei were studying. As soon as the Ichigaya Campus was confirmed, Botan sped down in a spiral heading for the distinct reiki that both tantei emanated. The campus was near the subway of JR Sobu Line in Ichigaya, Tokyo.

'Hmm… Seems like I won't have any trouble in picking them up,' Botan mumbled to herself.

"Why am I not surprised?" Kurama chuckled softly and shook his head when he saw that both delinquents were lazing on the rooftop of the Campus' gymnasium. He could see them standing and looking up where they were descending from.

The gymnasium, a five-storey building, was just one of the thirteen buildings in the campus. Yuusuke and Kuwabara both went to Hosei. Although the cafeteria in the campus was in the Student building, the two had agreed to regularly meet for lunch after buying some bento from the cafeteria and eating them together at the rooftop of the gymnasium.

Kuwabara Kazuma was a tall, plain-faced teen, with a presley-styled (A/N: for lack of better name) carrot top. He was the rival-turned-best friend of Yuusuke since junior high. He had decided, with the encouragement of his sister, Shizuru, to take up Bachelor of Arts in Lifelong Learning & Career Studies in college. Hosei University was the only institution in the country to offer such a course. The course focused on empirical as well as practical training in studies of Japanese, foreign culture, and educational and cultural business in contemporary society. Kazuma had developed an interest in it during his involvement with several tantei missions. With the breaking of the barriers between three worlds, he felt that the course would somehow bolster his interaction with various races in his work as one of Reikai's team.

Urameshi Yuusuke was the leader of the tantei team that Koenma personally handled. He had a slicked-back black hair showing a prominent widow's peak and had a cocky attitude. He had grown as tall as Kurama now. He was wearing black denim pants, a white muscle shirt and over it was a dark navy zip-front, long-sleeved tunic with single stripe across arms and shoulders. He wore white sneakers to complete the ensemble.

Being the Toushin (war god and one of the demon lords of Makai), who was once human, Yuusuke was burdened with the responsibility of taking care the citizens of his lands. That was the criterion for his decision to finish high school and go to college. He saw the course Bachelor of Arts in Intercultural Communication from the brochure of Hosei University that Kuwabara was contemplating in going to. When he read that the focus of the course was to explore and discover ways of solving inter-cultural problems, including cross-cultural friction and misunderstandings, he knew right there and then that he had found the right path to take. Despite being a war god, he was aware that there were things that could not be solved by fists alone. With that in mind, he went with Kuwabara to take the entrance exam. With the help of lady luck, both teens passed.

Fortunately for them, both of their departments were located in the same campus of the university, Ichigaya Campus. The campus itself had its own gymnasium building that it gave them the opportunity to spar and exercise.

"Oi, Kurama! Botan-chan! What are you guys doing here?" Kuwabara screeched at them, waving his arms enthusiastically with a huge grin on his face. He wore a gunmetal cotton polyester short-sleeved t-shirt with v-neck collar & coloured side panels, tight blue jeans and dark brown nuback shoes

Both Botan and Kurama winced at his loud voice. Botan just hovered her oar near them while Kurama lightly landed on his feet in front of the two.

Do tell me that the Toddler have another mission for us? I sure hope so. I'm bored here! Yuusuke complained, shoving both hands in his side pockets of his jeans.

I really have no idea this time, Yuusuke-kun. I'm not privy to the information. Botan replied. You'll have to wait till we get to Reikai. We can't dally here any longer. Koenma-sama is probably on his way back from Makai and he's really expecting us to be there on his return. She took each of their hands and placed them on her oar. You'd better hold on tight. I have to fly fast to get there before he does.

Kurama immediately sat on the oar and held on to Botan's waist. Yuusuke and Kuwabara barely managed to grab her oar securely just before she zipped them all away from the rooftop without further warning. Outraged screams could be heard from both Yuusuke and Kuwabara as they felt the hard wind whooshing pass against their faces.

Chikuso! Why is it that the fox gets to sit on the oar while we only get to dangle? shouted Yuusuke. That pacifier-sucking toddler had better have a really good mission to make me go through this humiliation! he ranted.

Botan just ignored his ranting and sped back to Reikai. Kuwabara was too scared of the speed to say anything and had to hold on for dear life. Kurama just closed his eyes and prayed to any god who was listening, to let them reach their destination sane and intact. They broke through the clouds and barrier between worlds at high speed. They looked down and saw the long stretch of River Styx. At the end of the river, they could see the looming pagoda-like spires of the Gate of Judgment. Botan abruptly stopped in front of huge double doors and let her passengers dismount. She pressed the intercom on the wall and announced their presence. The doors slowly slid open, the ground shaking as those enormous doors came to a complete stop with a loud bang. A long stretch of darkened hallway was revealed. They hurried through it at Botan's prodding.

Their entrance to the opulent office of Koenma was met by an indignant shout from the said prince. George could be seen cowering in the left corner of the room, clearly fearful of his boss' ire. Koenma was pacing in front of his large desk with Hiei by his side giving him an apathetic look. When Koenma saw them enter, he stalked towards them, hovered over Botan and shoved his face into hers.

"What took you so long! I have specifically instructed you to return with these three," pointing at the tantei, "at once!" he snarled at her, eyes flashing in anger.

Gomen nasai, Koenma-sama! Honto ni gomen nasai! she bowed repeatedly in apology. We were delayed when Kurama-kun's fangirls decided to chase us around the campus. They were quite persistent and it took us about 10 minutes to completely lose them. We left once we were in the clear and picked up Yuusuke and Kuwabara-kun without delay. She explained quickly to prevent another outburst.

Back off, Koenma! Yuusuke grabbed Botan and placed her behind him. She flew us over here as soon as she found us. If we were delayed, then it was not her fault, he defended her. Anyway, we're here. Let's get this over with. I still have classes to attend to this afternoon and I'm sure the same goes for Kuwabara and Kurama.

Koenma went slack-jawed and bug-eyed at this. This was the first time that Yuusuke expressed any concern about school. He looked at the others and saw that it surprised them as well, except for Kuwabara.

What! What! Yuusuke noticed the sudden silence and looked around him. Che! Can't people change? He slouched, shoved his hand in his pocket and sulked. It's not like I love school. I just thought it's a necessary evil that I have to go through, he grumbled.

"Hn! The Toushin has matured," was all Hiei said, nodding his head in approval.

"Hasn't he?" Botan agreed and then beamed at Hiei. "Keiko must have been delighted."

Okay, enough! We're not here to marvel at Yuusuke's change of heart, declared Koenma. He went behind his desk and sat on his executive leather seat.

"We're not?" replied Kuwabara in his not so surprising display of comic idiocy. "He, he. Just kidding Koenma." He scratched the back of his head in embarrassment when the prince glowered at him.

"Let's cut to the chase, shall we?" was all Kurama said. "Why have you called us? What's so pressing that you even risked your life going to Makai just to get Mukuro to let go of Hiei from his duties?" Kurama inquired.

"Yes, let's!" Koenma took a deep breath and calmed himself. "This is in relation to what happened yesterday, here in Reikai." He started. "A couple of days ago, a war was concluded in the wizarding world. This occurred in Great Britain, to be exact. The most evil wizard to ever exist, Voldemort, was finally annihilated."

Hold it right there! Yuusuke interrupted, putting up his right hand. What wizarding world? I thought there were only three worlds, not counting the Netherworld of Yakumo that was already destroyed. He asked, confusion clearly showed on the expression of his face.

"It's not really a different world. It's actually part of Ningenkai except that only those with magic can see and access them. Some of the non-magical humans who have immediate families with magic are aware of its existence," explained Koenma.

"Koenma-sama, I thought you said this assignment is related to what occurred here in Reikai. What does it got to do with the war?" A bewildered Botan asked.

I'll get to it if you two will allow me to finish without any further interruptions! Koenma exclaimed in exasperation. He glared at both Yuusuke and Botan, effectively shutting up the others from adding their two-bits.

"As I was saying, Voldemort was annihilated two days ago and we, in Reikai, were finally able to trace his soul and capture it. This guy died twice already but his soul managed to evade our ferry girls those two times. This man had caused a lot of unscheduled deaths all over Britannia," he shook his head in dismay over the wasted lives. "Anyway, his soul was brought here for judgment yesterday. Alas, it was also the day that Rando was to be transferred to a more secure prison. Tom Riddle, Voldemort's real name, saw a shackled Rando. Out of curiosity, he asked his guide about the demon. Aono was his guide and she told him all about Rando and his abilities. You know how she was." He put up his hand to cut off Botan from asking him the dreaded question. "Yes, Botan. You heard it right. I said WAS. Voldemort and Rando killed her. The four prison guards transporting Rando were also killed. Tom Riddle had completely escaped us again. But this time, he is in a demon's body that has its memories and skills still intact. Coupled with his powerful magic and possible access to Rando's youki, he will become an immensely powerful wizard and darn near invincible." Koenma explained with hands clasped tight on his desk.

All of them were riveted in place at the implication of what the prince just told them. Botan was silently crying in grief for the loss of a fellow guide and friend. Yuusuke saw this and pulled her in a consoling embrace while staring at Koenma.

"A few hours ago, I received a report about the footage taken by the security camera during the encounter. It seemed Rando was not a victim here like we first thought. From the data gathered about Riddle, it was clear that he is a master of Legilimency. This is a wizard skill that is equal to telepathy but a lot more intrusive. I have surmised that he tried to use this skill to impose his will on the demon. Somehow, Rando detected his attempt and blocked him. Instead, he volunteered the use of his body just to facilitate their escape. He was able to convey this offer in a matter of seconds when they passed by each other. And in those few seconds, Voldemort accepted his offer and possessed his body. With shared control, he was able to do his wandless magic to free them from the shackles and the demon killed Aono and the guards with his bare hands. Unluckily for him though, Tom Riddle is an expert in treachery. Once they were free from Reikai, Riddle restrained Rando's control over his own body with mere strength of will alone." Koenma explained to them grimly.

"Furthermore, Riddle is back in Britain. Right now he's laying low. There is good news though. Voldemort will need at least a couple of months to totally subdue Rando's will and have absolute control over the body and its youki."

George stopped cowering from his corner, brought some documents and handed them over to Koenma.

"This is where you guys come in. This is your mission," he told them gravely. "You are to infiltrate Riddle's hideout, neutralize his minions, the Deatheaters and obliterate their leader. I do mean Voldemort's soul and Rando. Both have exhausted all of their chances. You are to take them both out of existence!" Koenma's voice rang in finality.

Samhain - literally means "summer's end", a Celtic festival held on November 1st
Tantei – detective or investigator
Reikai – in YuYu Hakusho (YYH) or Ghost Fighter (as titled in the Philippines), this is the world or dimension of Spirits where the River Styx can be found. Ferry girls are like grim reapers who take the souls of the dead to be judged at the Palace
Yaoi – homosexual relationships
Oni – ogre
Gomen nasai – I'm sorry
Mukuro – she is one of the three demon lords who rule Makai
Ningenkai – the world or dimension of humans
Arigatou – thank you
Ja ne – see you later
Reiki – spiritual energy of humans and Reikai citizens
Youko – Youko Kurama is the demon name of Kurama in his demon form, a 5-tailed silver demon fox. As a demon, he was a notorious thief in Makai
Kisama – a swear word equivalent to 'shit' in English
Chikuso – a swear word equivalent to 'damn it!' in English
Honto ni gomen nasai – I'm really sorry
Youki – demonic energy of demons