This story is a work of Fan Fiction. Any and all characters, situations, story arcs, etc, are all fictitious, and bear no meaning on the main canon of the respective franchises. All of this was written by two nerdy, strange college students who should be studying rather than writing this story.

Metal Gear, Metal Gear Solid, and all its characters are owned by Hideo Kojima, Kojima Productions, and Konami

YuYu Hakusho, and all its characters are owned by Yoshihiro Togashi, Studio Pierrot, Sheuisha, Shonen Jump, Fuji TV, Animax, VIZ Media, and Funimation

Please support the official releases.

Notes from the Authors: The following story takes place inbetween the Dark Tournament and Chapter Black Sagas of YuYu Hakusho, and inbetween Metal Gear Solid and Metal Gear Solid 2: Sons of Liberty.

It is recommended that you read Neither Enemy nor Friend before diving into this story, as it is a direct continuation of what happened between Kurama and Gray Fox's bout.

Some scenes may also contain subject matter not suitable for everyone. This includes strong language, scenes of blood, gore, and other ghastly-type stuff. So if you hate people dropping F-Bombs and cussing up storms (We're looking at you, Yusuke...), and if you're squeamish with bloody scenes, please look away.

With that, let's begin the story. We hope you enjoy!

-Izzy Raimi and Chia

YuYu Hakusho: The Gray Fox Files

A YuYu Hakusho/Metal Gear Collaborative Crossover Story

By Chia and Izzy Raimi

Ch.1: The Renegade Spirit

You would think that death would be the only solution to escape the chaos of the Living World. Many people have felt as if they've suffered enough of their mundane life, or have had very traumatic experiences before, that they would just want it all to end. If you talk to someone who had felt nothing but pain, they would say something that you are guaranteed you've heard before. They want to be released from their pain through the quickness and swiftness of death. And it was not just the humans either. Even the greatest, heinous, and most fiercest demons have wished to be released from endless misery and suffering. Though there's a common misconception that no one will tell you, however. Death isn't all what it is cracked up to be.

Just like the Living World, Spirit World and Demon World had their own share of problems.

For the ruler of the Spirit World, his job never ceased. King Enma Jr., or Koenma as he was most formally known, was deep in thought about something that never happened before. Earlier, his ogre workers were scrambling and tripping over each other in the office area when they heard a spirit was loose. There was shouting, angry scribbles with pens, and even a few sprained ankles during the whole ordeal. Reports were rampant of a strange spirit just walking around the general area, and has even laid waste to a few demons who were still awaiting judgment on their placement in the afterlife, but it's undetermined as whether or not this one has evil intentions. To put it simply, for the first time, there was a renegade spirit roaming in the Spirit World. In all the centuries Koenma has passed judgment on every spirit that was brought before him, not one has gone under his nose. But, as they say, there is a first time for everything.

What perplexed Koenma, however, was how this event could have transpired. Koenma thought to himself very hard about the circumstances at how this could've happened. Could a demon have gone through the portal without him realizing? No, that couldn't be possible, because the portal was strong enough to keep out even the strongest A or S-Class demon, and this spirit seemed very strong on its own. Could it have been an escapee from Hell? Did a spirit hate his judgment so much that he was wreaking havoc in Spirit World as retribution? Thinking, however, that wasn't possible, because there were reports of other demons that were harmful to begin with who were already killed. Man, this is a brain bender! Who or what was this spirit?

Unfortunately, Koenma's pondering was brought to a screeching halt when a big, blue, horned ogre wearing a leopard loincloth bursted through his doors with stacks of paper in hand. "Koenma, sir! Koenma, sir! We have a problem!" The ogre said.

Koenma slowly opens his eyes, staring daggers at, as he calls, the "Blue Annoyance" before him. "What is it, George? What could possibly be more important than trying to figure out what spirit has somehow messed up the protocol in this place, and for all we know, causing chaos when we least expect it!"

George tried to keep his footing as the Spirit World ruler was yelling at him. "Well uh, sir, it's about the spirit you asked Botan to retrieve in Alaska." He holds up a folder. "I have her report right here, and there's something you should know."

Koenma raises an eyebrow. "Really? Like what?"

The blue ogre tried his best to convey his words. "Well, uh, you see…" He paused. "…There was no one there."

A brief silence for what seemed to have lasted an eternity filled the room, though that silence was broken with only one word from Koenma.

"…WHAAAAAAAAAAAAAT!"

George stumbled and fell with the papers falling right on top of him, however still holding Botan's report in his hand. Groaning in pain, George held it up for Koenma. "Just read it sir." He said, his speech muffled. "It will explain everything."

Frantically, Koenma hopped off his chair, running and grabbing the folder and immediately opening it while going back to his seat, all the while whimpering in fear. "Doooh, this isn't good." He said to himself, sucking on his pacifier nervously. "This isn't suppose to happen. Doooh, Botan. I really hope you're not slacking." As he quickly scanned the report, a giant exclamation point flashed in his mind. What the hell? Koenma thought. This can't be right… Botan couldn't find anyone over there?

Shadow Moses Island; 2 hours earlier

If you ever believed a war zone could ever be established and waged in a confined room, you've not experienced a one on one fight against Metal Gear REX. The twisted, burning wreckage, the smoldering embers, and the very scent of spilled blood, it was all still fresh from Snake and Liquid's battle earlier. A strange addition to the rather grim scenery was the arrival of a young looking woman riding a floating ore. She had blue hair, pink eyes, and wore a pink kimono. To anyone, this would seem like some strange hallucination, but she was actually here on business. She recalled what Koenma said to her before she said foot on this cold part of the United States.

Now, Botan. There was a report that someone died in an area called Shadow Moses Island. It's located in the Fox Archipelago in Alaska, in the US. You know what to do when you get there. Just make it quick, it's very cold there.

Botan shivered as she landed. Brrr, he wasn't kidding. She thought. As she got off her ore, she walked and looked around. The place looked like it was hell. The lights in the room were red from the alarms going off, giving it a grim look. Fires were in the corners, smoke still apparent, and she even saw a discarded rocket launcher near her feet. However, she jumped when she saw a tall shadow on the wall. That shadow belonged to a huge machine, what appeared to be a giant robot. It looked like it was a hunchback dinosaur, or some other creature of some weird design. The structure puzzled Botan. What is that thing? She thought. That looks like something out of Koenma's manga. She walked over to it, inspecting it. Man, did someone ever put a number on it. It was scraped, dented, and some of its parts were broken. The cockpit was still hanging open. It looked like a menacing landmark, long forgotten.

Then, she looked at the feet of the giant mech. She noticed a lot of blood near its feet. So, this is where the deceased lied. Yusuke sure was lucky he didn't die that way. Now, if there was a place of death, surely a spirit still wandered around here, right?

Botan looked around. "Hello?" She called out. Maybe the spirit was scared and didn't want to come out. "If there's anyone here, you don't have to be afraid. I'm not gonna hurt you. Besides, you can't hurt what's already dead!" She walked around, scanning the area. There was no answer at all. All was quiet. She called out again. "Is there anyone here? I'm here to collect you and take you to the Spirit World! Sooner or later, you'll have to come with me!" Still silent. Botan seemed confused by this. There was almost always a spirit she could find and collect. But, no one was here.

Botan put a thoughtful finger to her lip. How could she coerce this spirit to show itself? Then, she had an idea. Bingo! She thought, jubilantly. She called out again.

"If you come out, I promise I'll give you a kiss~!" She said, winking. Surprisingly, still no answer. Frustrated, Botan stomped her foot. Surely that would've worked! Huffing, she climbed on her ore, and flew around the area, looking for the spirit. She looked in the corners, in the ceiling, even underneath the giant mech. Something didn't seem right with the mech, however. She flew down to where the bloodstain was. She climbed off her ore, kneeled down, and inspected the spilled crimson fluid. She noticed it was dry, and looked at the bottom of the mech's foot. Nothing was evident, except the blood. No body parts, no organs, not even tissues. It's as if the body completely shattered out of existence.

Then it donned on her. If there was no body, then that means…

"There's really no one here…" She said to herself. Though inside, a bad feeling sunk in. Uh oh… This isn't good.

Koenma's Office; Present

After reading through the report, Koenma closed the folder. So, if the spirit on Shadow Moses Island was missing, and if there's a loose spirit in the Spirit World. That's it! Koenma thought, snapping his tiny fingers. It would seem that Koenma has found a small link between the disappeared spirit from the Human World, and the renegade spirit.

Looking forward at George, who was still reorganizing his papers, he had an idea. "George, get me Botan and Kurama. I need to have a word with them about this."

"So, you think this might be serious, Botan?" Asks Kurama, walking up to Koenma's office doors.

"I really hope not. Though I feel it might've been about that report I filed earlier." Says Botan. Both of them open the doors, seeing Koenma with a stack of files on his desk.

"Ah, Botan! Kurama! Delighted to see you. Please, have a seat. I have an important matter to discuss with you." Botan and Kurama sit down across from the Spirit World ruler, wondering why he has all those files on his desk.

"What exactly is this all about, Koenma sir?" Asks Botan.

"Well, it's about your report." He replies.

Shoot, I knew it! Botan laughed nervously. "Okay, sir, now let me explain. I know I couldn't find anybody, and I admit that even I can be blind from time to time, but rest assured, I would nev-"

Koenma raises a hand. "Take it easy, Botan. You're not in trouble. I just need to assure you that I think I have a link between your missing spirit and this renegade spirit we have here." Botan sighs in relief, and Koenma turns his look towards the former fox thief. "However, I think that you know more about this ordeal than we do, Kurama." Kurama raises an eyebrow. "Those E-Class demons you and Hiei took care of a while ago. I know you could easily take those guys down. But those scrapes you had, those wounds…" He pointed to the areas his uniform was ripped. "Those were too clean cut for an E-Class. Who did you have a fight with?"

A small feeling of dread sunk into Kurama for a second. He still freshly remembered his fight with the cyborg ninja Gray Fox. Was he the renegade spirit Koenma was talking about? Kurama tried his best to dodge the question. "…Hiei. I fought Hiei. You know how he is. Always wanting action, tired of just standing around. So we were walking around, I turn and I said, 'Hey, fight me.' He says, 'Okay.' So, he takes his sword and just rips up my clothes, and… you're not believing a word of it, are you?"

Koenma puts small palm to his face. He sighs. "You know, with how much of a tactical specialist you are, and how you're good at strategizing during certain situations, I would've expected a better answer than that." Koenma said. "Do you really think I'm that stupid? Don't answer that!"

Kurama looked down. Well, that failed miserably. "I apologize. I just… I don't want to reveal a lot about this man. He's innocent, and I don't wish to see him punished."

Koenma hops on his desk. "So, are you saying you did meet the renegade spirit?" Kurama nodded. "Are you really worried if this spirit gets in trouble?"

"Very worried." Kurama said. "He had me try to kill him, but I spared him. And Hiei almost tried to kill him as well. He's a spirit in pain, and has been in pain ever since he was alive, and I don't want anymore of it administered on him. He told me what he had been through, and I feel that he has suffered enough. He is unlike Yusuke. He's battle hardened, and not like any human I've ever dealt with thus far. If he's found, don't be too harsh on him, that is all I ask."

Koenma sighs and puts a hand on Kurama's shoulder. "Don't worry. I'm not going to do anything like that, unless things get really, really drastic." He said, looking straight at Kurama. For a thief, at least Kurama can be truthful and sincere. "If he's what you say he is, I give you my word that I'll try to see if we can bring him in alive. But for now, all I need is some information. Do you know if this spirit has a name?"

Kurama thought to himself. What was Gray Fox's real name again? He recalled his conversation with him before he took off.

My name is Frank Jaeger. Though that was a name from long ago. Call me… Gray Fox.

Kurama looks at Koenma in the eye. "He goes by the name Gray Fox. But his real name is Frank Jaeger, if that helps at all."

Koenma thinks to himself. "Frank Jaeger, huh? Let's see…" He hops back into his chair, and shuffles through a stack of files. He finds a folder listed Frank Jaeger – Top Secret. Opening the folder, he reads aloud Frank's file:

"Frank Jaeger, also known as Gray Fox and Null, was born sometime in the 1950s. He fought in many battles and was apart of the military unit FOX. He would later join the FOXHOUND unit under the leadership of one Big Boss, and worked with Solid Snake in Operation Intrude N313 and Operation Intrude F014, the Outer Heaven Uprising and the Zanzibar Land Disturbance respectively. He was killed in a fist fight with Snake in a minefield after he was under orders to betray him by Big Boss." Wait a minute, killed? How could that be possible? He would've passed judgment on his spirit a long time ago. He took a look at the date for the Zanzibar Land mission, it was 1999. That was six years ago! What was even stranger was that his file ended around that time. This seemed very surreal, as if someone erased everything after Zanzibar Land.

Kurama and Botan looked very puzzled by this turn of events. How could he have died and not even appear in the Spirit World, and also not even appear as a ghost in the Human World? Koenma then examined one of the names mentioned. Solid Snake… that sounds familiar. He scours through a few more files and pulls another folder that reads David-Top Secret. He starts to read his file:

"David, also known as Solid Snake, was a clone born from the DNA of Big Boss. He and his brother Liquid Snake were a part of the project Les Enfants Terribles, where the two of them were deemed as the "Sons of Big Boss". Originally a Green Beret, he joined the special force group FOXHOUND and took part of Operation Intrude N313 and Operation Intrude F014, the Outer Heaven Uprising and the Zanzibar Land Disturbance, respectively. He worked with Frank Jaeger, or Gray Fox, on both missions, and both worked under the leadership of Big Boss. Snake then killed Jaeger in a fistfight in a minefield in Zanzibar Land. Later on, he would take part in a mission that would lead to Shadow Moses Island, where he quelled a rebellion involving renegade FOXHOUND members Decoy Octopus, Revolver Ocelot, Vulcan Raven, Sniper Wolf, Psycho Mantis, and their leader, Liquid Snake. He was also responsible in preventing the launch of a nuclear missile, thus saving thousands of innocent lives."

After reading the file, Koenma closed the folder. Looking up at Botan and Kurama, he had a distinguishable smile behind his pacifier. "My friends," Koenma said. "I think we have just found our lead."