Also Known As
Age 22
Gender Male
Height 6'4"
Weight 250lbs
Blood Type B
Professional Status
Kingdom Luxuria
Occupation Knight



Demon Hunter

Level 42
Experience 0/42,000
Bounty 560,000
Family Deceased
Status Alive
Image Gallery

 Youkai, often refered to as just Kai, is a former mercenary of the occupations Knight, Shinobi, Pirate and Demon Hunter. He is originally from the Kingdom of Luxuria, and now resides in Area 11, as the leader of their military.


Youkai is a tall, fair-skinned, and very muscular man. He has short, spiked silvery-white hair, with a single rogue lock of hair hanging over his face. Kai's eyes are a unique purple color. His canine teeth are abnormally large as well, and he is often seen with a smirk or grin on his face.

As for attire, Youkai wears a long, high-collared, black jacket that reaches most of the way down his legs. The collar has a silver hole on each side, and the sleeves have several silver studs on them. Kai wears no undershirt, and wears the jacket unbuttoned, leaving the majority of his chest and abdominal region exposed. Youkai wears simple black pants, with a purple hue to them, along with black shoes. He wears a brown belt, with a silver belt-buckle.


Kai is normally a fun-loving and laid back person. He often jokes around with friends, and often messes with his opponents as well. Those without thick skin can sometimes be insulted by his jokes, but that's normally not his intention. He also plays with his opponents more than he should, and pretty much never goes all out from the start of a fight.

Despite that, Kai is still capable of being serious when the need arises. He'll do whatever it takes to complete his goals and get what he wants, and has no real problem with killing innocent people as long as it's advantageous to himself. It's not to say he's entirely cold hearted though, as he wouldn't ever think of harming people he actually cares about. Kai is also quite intelligent, despite his seemingly arrogant personality. 

Kai could also be described as incredibly greedy, which likely came from the fact that he had absolutely nothing as a child. He gains lots of money from his job as a bounty hunter, but often spends the money very quickly on expensive things, and doesn't often have lots of money in his possession because of that. 

When it comes to fighting, Kai enjoys it, and doesn't hold back his power out of arrogance, but out of wanting to prolong the fight so he can have more fun. This obviously only applies to opponents weaker than him, although he gladly fights people who are much stronger than him, in hopes to increase his own power.


Youkai was born in Luxuria into a very poor family. Kai's mother was very sick, and all the money that his father made was normally put into keeping her alive. Because of this, Kai and his father had little to no possessions, and lived off of what Kai's father could fish or hunt, or really, the small portion of it that they didn't have to sell. The poor were discriminated against in Luxuria, so life was hard for Kai's family. His father taught him a lot of things when Kai was young, in such a bad place he was forced to grow up quick. 

Kai's father was not originally from Luxuria, and had secretly been a high ranking general in Invidia. After years of being a general in Invidia, he realized how terrible his actions had been, and fled from the kingdom, and went to Luxuria under a false name. He even went as far as to cut the tendons in his sword hand to prevent him from ever committing such atrocities again. Many of his men were loyal to him more so than Invidia itself, so they too fled with him. He became the leader of a mercenary group comprised of those men soon after, called the Phantom Mercenaries. He was highly respected by these men, but thought he did not deserve their respect, so after several years he met Kai's mother, and decided to leave the mercenaries and settle down.

Several years later, when Kai was about 9, his life began to fall apart. The Luxurian government found out about Kai's father's true identity, after capturing one of his former mercenaries. One of Luxuria's generals and his soldiers were sent to the small town where Kai lived to execute his father. Despite cutting the tendons in his sword hand, Kai's father was still able to easily defeat most of the soldiers, but could not properly defend himself against their leader, eventually being killed. After that, they decided it was best to kill Kai's mother as well. The soldiers forced Kai to watch his mother being raped by the Luxurian general, in a pool of his father's blood. After that was done, his mother was choked to death in front of him.

The general decided that Kai could live, but be forced into the military. Kai tried to resist, killing a couple soldiers in the process, but he was eventually knocked unconscious. Kai was tortured for both his father's actions, and his own, when he resisted joining. The torture was as mental as it was physical, and by the end Kai had no will to resist further, becoming obedient to them after mentally blocking out his past as a way to cope with what he was put through. He was recruited, and actually showed great promise as a soldier.

Several years later, due to his high skill, he was put into a sort of super soldier program. Luxuria wanted better and stronger soldiers, since tensions between kingdoms were rising. They injected him with various forms of demon blood in an effort to strengthen his abilities, and that it did. They also made him into a sort of pseudo-homunculi, after messing with his magic circuits extensively, to increase his magic power exponentially. Kai grew much stronger, and they believed that they had succeeded, rightfully so, because they had, that was at least until Kai saw the face of the Luxurian general that killed his parents.

Upon seeing that man's face, intense feelings of anger and hatred broke through the mental barrier he'd created to block out his past, and it all flooded out at once. Kai went into a fit of utter rage, his hair and eyes turned red and he grew much more beast like, he murdered the man who'd killed his parents, and slaughtered everyone else there as well, soldier and scientist alike, before outright obliterating the entire facility. Afterwards, Kai passed out in the rubble, returning to normal.

After waking, Kai was his old self again. He quickly fled the area before more Luxurian's could arrive and see what he'd done. He had little recollection of what happened, but was certain he'd done it. Kai decided he'd search for the remaining members of the Phantom Mercenaries. He soon found that they were almost entirely killed off by the Luxurian government as his father had been, but he managed to find that most of their children were being kept in a military prison base in Luxuria, and that they were pretty much all of a similar age to him.

Kai invaded the base, killing all of the soldiers and freeing the children of his father's mercenaries. Pretty much all of them had been told stories of Kai's father from their own fathers, and agreed to follow their father's footsteps and join Kai, creating a new version of the Phantom Mercenaries. Most of them wanted to attack the Luxurian government, but Kai convinced them that they weren't ready for that, and that they should leave the kingdom for now.

They quickly fled the kingdom, and began their career as mercenaries. Most people were skeptical of hiring a bunch of children, but after Kai showed what they could do, they were hired quite often, acting as anything from bounty hunters or assassins, to bodyguards. Kai trained them almost nonstop when they weren't on missions, and many new members joined their ranks along the way. Soon enough their group was quite powerful, and could be considered a small army even.

One of the new members was a former member of the Demon Hunter Organization named Itami. Kai and Itami soon became best friends, and taught each other a lot. Itami helped train and hone Kai's immense magical power, and taught him many techniques of his former organization, a place where Kai would never be welcome. Itami eventually became Kai's second in command, and a very helpful adviser and comrade.

Kai and the rest of the mercenaries decided they were ready to head back to Luxuria. Despite their growth, Kai knew they were still much too small to do anything in a normal war. Because of this, he organized and launched smaller surprise attacks on major outposts around the kingdom. They won most of these battles as Luxurian's weren't very used to combat, as no active war was occurring. In fact, most of the soldiers were forced into the military against their will, and gladly joined Kai in fighting against Luxuria instead of fighting against him. Kai raided the bases, distributing the food there to the many poor villages of Luxuria. This went on for quite some time, and a civil war was started.

Luxuria's government decided that fighting against Kai with disloyal soldiers was a bad idea, so they attempted to simply assassinate him. They attempted to assassinate him while he was celebrating a victory with the rest of his mercenaries. The assassin tried to take him out from a long ways away, so Kai wouldn't notice it coming. And he didn't, but unfortunately for the assassin, Itami did. Itami noticed it slightly too late however, and all he could do was throw himself in front of the attack instead. Kai's best friend died in his arms after sacrificing his life for him. The assassin fled after he realized he failed.

Kai was completely discouraged from the war and fell into depression. He wanted to stop the war altogether, so that he wouldn't have to watch more of his friends die. The other mercenaries convinced him that if he stopped now then Itami's sacrifice would have been for nothing, and that his death just meant that they should continue no matter what. Kai eventually came around and continued to fight against the Luxurian government with renewed vigor.

Eventually, nearly the entire Luxurian army had turned against the royal family, and the war was all but over. The royal family fled from the capitol for their lives. Soon after this however, the second impact occurred. The entire world was changed, and the World Government killed the former Luxurian Royal Family. Kai was annoyed at this, having wanted to kill them himself, and soon realized the new royals were just as bad as the last.

Despite this, he was against starting another war, having seen the bloodshed it brings, especially to people he cares about. The Phantom Mercenaries went back to being just that, mercenaries. They worked as they used to for several months, but it just didn't feel right to Kai, so he left the mercenaries to go off on his own.

Kai lived in a secluded area, training himself for several years after. Eventually, he decided to go back to the normal world, and was happy to see that the World Government had been taken down in his absence. Kai moved to Area 11, and joined a guild called Dusk soon after, even becoming the leader of Area 11's military.


Physical AbilityEdit

Kai's physical ability can be described as nothing less than Superhuman. He has honed his physical abilities throughout his entire life, and has achieved completely unnatural levels of strength, speed, durability and endurance. Kai's strength is enough to easily smash through most metals with a single strike, and is capable of breaking bones quite easily. Kai simply striking the ground can cause shock waves large enough to level several buildings and make a significant sized crater. He can freely move around in several times Earth's gravity with little stress, seemingly unaffected. Additionally, Kai is able to lift dozens of tons without all that much effort, and a limit to his physical strength has yet to even be shown.

Kai's speed is just as impressive, easily exceeding the speed of sound to the point where the two aren't even comparable. In truth, Kai's speed is closer to lightning than it is sound. He's fast enough to disappear from sight completely, or even create afterimages of himself. Most onlookers would mistake his speed for teleportation, because of their inability to even register his movement. Kai has no trouble dodging bullets and other fast moving projectiles, and has been shown to be able to react to, and subsequently avoid a lightning bolt. The speed of his strikes surpasses his own movement speed, allowing him to quite easily strike an opponent dozens of times in a mere instant.

Kai is durable enough to take strikes of others with similar, or superior, strength to his own. His entire body possesses inhuman durability. For example, bullets would be nothing more than a bee sting to him. Kai's bones are also much more durable than a normal human's ever would be, comparable to metal. He also has a heightened resistance to heat and cold, and can survive in incredibly harsh conditions. As well as durability, Kai also has incredible endurance. He's able to fight for days on end without rest and show little to no decrease in ability.

Strong FistEdit

This taijutsu style is a both an "external" style and a "hard" style martial art:

An "External" martial arts style is a fighting style which is characterized by the focus on fast, explosive movements and developing the practitioner's physical strength and agility. Training regimes for external styles focus around muscular power, speed and application, developing the user's muscle memory and their stamina, building it all up to the desired 'hard' physical level for real combat. Kai has achieved this by training rigorously for hours doing exercises such as punching and kicking a hard, wooden training post, hundreds of squats, as well as cardiovascular exercises such as skipping with a jump rope.

A "Hard" martial arts style is a fighting style which is characterized by its approach by intercepting and countering an opponent's incoming force with equal and/or greater force: In these styles, the practitioner either directly blocks the incoming attack with an attack of their own or by cutting through the attack at an angle. These styles rely on external power; in the case of a Strong Fist practitioner, it is the user's superior strength and physical conditioning, that creates success. The practitioner fights head-on offensively, and their offence becomes their defense.

Also, Youkai's incredible strength, as well as his reinforcement magic, allows him to use several Strong Fist techniques that would regularly require the use of the Eight Inner Gates.


Rokushiki is a special, superhuman martial arts style.

  • Geppo - The Geppo allows the users to actually jump off the air itself, allowing them to stay in the air for much longer than usual. Youkai can use this technique to cross great distances without ever touching the ground, or set himself up for swift, aerial attacks.
  • Tekkai - The Tekkai hardens the users' muscles to the level of iron, in order to nullify damage taken from attacks. Although, with Kai's superhuman strength and durability, his muscles are hardened to a much higher level than iron, and his defense is incredibly tough to break though. Normally this technique requires the user to be motionless, but Kai has mastered a form which allows him to move while using it.
  • Shigan - The Shigan is a close-quarter combat technique, in which the user pushes their finger into a certain target at a very high speed, leaving a wound similar to a bullet wound. It is capable of pushing people several yards away. It is a very useful technique that can connect rapidly and accurately, which works well with the Rokushiki users' impressive speed and agile techniques. Kai often uses this technique with not just his finger, but his entire hand, to create much larger wounds. He is also capable of replicating the technique in his swordsmanship, allowing for lightning fast thrusts with his sword.
  • Rankyaku - The Rankyaku is a powerful projectile technique, in which the users start by kicking at a very high speed and strength, sending out a sharp compressed air blade that can slice objects and greatly damage a human body. This can also be used with anything long, such as Kai's sword in place of his leg.
  • Soru - The Soru allows the users to move at extremely high speeds in order to avoid attacks, as well as to attack at higher speeds and with greater power. It was revealed that the principle of this move was to kick off the ground at least ten times in the blink of an eye. This increases Kai's already superhuman speeds to insane levels.
  • Kami-e - The Kami-e makes the users' body go limp in order to avoid any attacks, and float like a piece of paper.
  • Rokuogan - Kai places both his fists right in front of the target and launches a devastating shock wave in a forward direction. The shock wave created on its own is enough destroy an entire forest or town.


Youkai is a master swordsman, having trained with a sword throughout his entire life. Kai is capable of employing many different styles of swordplay, and can use this to through his opponent off, switching up his style as soon as his opponent thinks they can read him. His knowledge of so many sword techniques also allows Kai to easily read his opponents, and predict their moves long before they make them. Kai's strength allows him to overwhelm most opponents in sword duels, even going as far as outright breaking his opponent's blade in two. His speed is also nearly impossible to contend with, as his strikes are quite literally faster than lightning. Kai is able to launch dozens of sword strikes in the blink of the eye, creating a nigh unblockable barrage of blades. Also, Kai has been shown to completely change the direction of his strikes mid-swing, allowing him to catch his opponents completely off guard. Additionally, Kai is incredibly precise, and knows exactly what places would be lethal or nonlethal to strike. This allows him to easily dispatch foes in a single strike if he needs to. In fact, he's been shown to be able to take down small armies using nothing but his sword, and be so precise as to leave them all alive.


Kai unlocked this ability after his best friend, Itami, was killed. It seems to be a manifestation of his will to never let anyone close to him die again. He blames himself for Itami's death, because Itami had to sacrifice himself to protect Kai from an attack he didn't see coming, something this ability would have allowed Kai to do. This is Youkai's magical ability as a Knight. This basically give him superhuman eyesight in many forms. Kai is able to see all kinds of light in the Electromagnetic Spectrum, such as x-ray, infrared, etc.. He also has both telescopic, meaning he can see very far, and microscopic, meaning he can see very small things, vision. However, probably the most useful things gained from this ability is Kai's ability to predict movement, allowing him to react to pretty much anything. For example, if multiple projectiles were fired at Kai, he would be able to see them, and exactly where they were going before they got anywhere near him, allowing him to dodge with ease. This works with basically everything, such as strikes in a close ranged fight, allowing Kai to block and counter effortlessly. Also, this can be put to use with Kai's own strikes, to give him unparalleled precision and accuracy. Since he can predict his opponents movements, he can strike directly where he wants to even on fast moving targets, in close ranged fights or with projectiles. In the simplest of terms, he never misses. Additionally, this can be used to mimic the sharingan's ability to copy an opponent's movements, since it works in the same manner.


Hellblaze is a demonic enchantment. Hellblaze is dark and mysterious power connected to the Demon Clan, and stems from the Demon Blood that was put into Youkai when he was forced into the super soldier program. The enchantment allows the user to generate and control black flames that cannot be extinguished. In addition to its immensely devastating power, the flames also nullify the regenerative abilities of an immortal. Basically, this allows Kai to permanently damage, or potentially kill an immortal being. However, despite their regeneration being nullified, they are able to heal as a normal human would. In battle Hellblaze can be imbued upon weapons to drastically increase their destructive potential, hurled as fireballs at an opponent or used in hand-to-hand combat.

Reinforcement Edit

Reinforcement is the most difficult Magecraft with the purpose of pushing a basis to the utmost. It is the foundation of all Magecraft that enhance the existence of the target by pouring prana, but as no clear expression of how much it can be enhanced is defined, almighty reinforcements are rare. It is the same as adding something to an object that is already complete, in case of failure the target will receive it as a poison. Success requires a good grasp of the inner structure to fill openings with Prana. Reinforcing the purpose of existence would be increasing the sharpness of a knife, the nourishment of food, or in the case of a living creature, physical strength and durability. It is impossible to reinforce something vague. As living things will resist invasion of your prana, reinforcing someone else is the hardest. By putting this in application, Youkai is able to create a bow out of the branch of a tree, repair a soccer ball, or change the shape of an object.

Kai often puts this to practice on his own body. With this he can exponentially increase his already superhuman strength, as well as his speed and durability. He is able to make his skin tougher than chain mail, and his bones harder than diamond. He can even apply reinforcement to his senses, giving him superhuman smell and hearing, and strengthening his Clairvoyance ability. Kai often reinforces his brain as well, immensely increasing his brain's power, allowing him to think and perceive information at much higher speeds than ever before.

Additionally, Kai is able to use a sort of "Reverse Reinforcement." This, as its name suggests, does the opposite of Reinforcement, and makes things weaker than before. At first this might not seem useful, but using this he can do things like weaken an enemy's weapon or armor, or even make them physically inferior to before, or slow down their brain's perception speed. So obviously, all that could be incredibly helpful.

Mystic Eyes of TransportationEdit

Kai's mystic eyes allow him to teleport anything in his line of sight, to somewhere else in his line of sight. He can't use this ability on himself, but that doesn't hamper the usefulness of this ability. This ability could also be used to move an ally out of harms way, or teleport an enemy in front of an attack. Offensively, this ability could be used to teleport objects and potentially drop them on an enemy, which would have varying amounts of usefulness depending on whatever he's teleporting. The farther the distance, and the larger the object, the more prana it costs Youkai to teleport. 


Youkai is able to use all three forms of Haki. The first form allows Youkai to sense the presence of others, even if they are concealed from view or too far to see naturally. The user can also use this Haki to predict an opponent's moves shortly before they make them, thereby making the attack much easier to evade with enough skill. This prediction appears to the user as an image or brief "premonition" of what the opponent will do in the user's mind's eye, and the damage the user will take if the attack actually "hits". It appears that the more killing intent the enemy has, the easier they are to predict. Although, more skilled users can predict future moves whether there are ambient murderous intents or not.

The second form allows the user to create a force similar to an invisible armor around themselves. Similar to Tekkai, this Haki allows the user to defend against attacks that would otherwise cause them harm. Significant physical force can still overcome this defense, however. Naturally this "invisible armor" can be used as a weapon to strike others with. It can be used to augment the user's own attacks, projected ahead of the user as pure brute force, or imbued in weapons to increase their effectiveness. Any attack enhanced by Busoshoku Haki hits immensely harder than it would normally be without it. 

The third type of Haki grants the user the ability to dominate the wills of others. The most common usage in the series so far is knocking those with weak wills unconscious. Whilst inexperienced users are restricted to merely overpowering the will of one individual or blindly knocking out weak-willed people around them, those with more expertise can pick out weak-willed individuals in a large group and knock them out without affecting those around them.


Black KeysEdit

Black Keys are charms used by Demon Hunters to repel demons. They take the form of long rapier-like swords (although they are generally thrown as a dagger or used to stab opponents). They are considered to be symbolic and have weak attack power, but its attack power is still enough to pierce through concrete walls. The amount of skill required to properly wield them causes the Black Keys not to be used often. They excel at interfering with and damaging spiritual phenomena rather than damaging them physically. The effect on beings like Servants is minimal but they are very effective against the creatures that are being hunted down by the organization, like the Vampire's and Ghouls. If they hit the shadow of a target, the target will be unable to move their body, leaving them to the mercy of Youkai. It could also be used to track down and seal or injure a target until Youkai tells it to stop doing so, or unless it is destroyed or neutralized by an outside force.

Also, Youkai is able to use a throwing technique called the Iron Plate Effect. This technique makes it so the black keys, instead of piercing what they hit, send the flying away with incredible blunt force. This force is enough to easily smash through metals, and can create shock waves large enough to level entire buildings, or, when enhanced with Reinforcement, can level entire city blocks with a single key.

Volumen HydragyrumEdit

Volumen Hydragyrum: Marrow of the Moon Spirit is a unique Mystic Code made from Mercury infused with Magecraft. Youkai excels in the art of manipulating flow, and the ability is shared between his rare multiple elemental attributes. The shapeless mercury can be sculpted into any shape and controlled at will. Uniting both attack and defense, it is a "perfect weapon" that acts as both his sword and shield.

He is able to easily transport it despite its normal weight being close to 140 kg with a spell of weight reduction (though he can lift that weight without much trouble, it's just more convenient to reduce it). Youkai normally has the Volumen Hydragyrum take the form of a weapon that he would carry on his person, such as a sword or spear. It takes on its true weight upon leaving his hand, and it is activated with the spell Fervor, mei sanguis (Boil, my blood.). Ten liters of mercury takes form once he allows it to change shape, becoming a large ball showing the mirror-like metal sheen of the substance. It begins to follow his commands upon forming, with a myriad of different applications. His initial command, Automatoportum defensio:Automatoportum quaerere:Dilectus incrisio (Automated Defense: Automated Search: Attack on command), causes it to start following him and defend automatically.

Made to freely interchange between forms, it can be called the "epitome of the magecraft of fluidics" controlled with Youkai's immaculate skill to perfection. Its regular form is a large ball three meters in diameter that follows and protects Youkai. It responds to his movements and commands, shifting between forms for different tasks. It can take on a shape like a jellyfish with a flat platform for Youkai to ride, and it can uses its tentacles to climb, attack, and defend with ease. Once he steps off, it quickly reverts to its ball form. Kai has taken it to a very high level, being able to freely change it's size and even it's state of matter with ease. Like stated above he often disguises it as a normal weapon to use in his own hand's, which is still quite effective. He may even have it shrink inside as to infiltrate an opponent's body, before having it expand inside them, killing them swiftly. Youkai can even use Volumen Hydragyrum to fly, forming it into a flat platform and levitating it with magecraft.

This Mystic Code can also be used as a tracking device as it uses its extremely sensitive sense of touch to make judgments based on vibrations in the air, sense differences in air temperature, and locate heat sources.

Kai can even allow it to take a human-like form. In this form it can still freely manipulate it's body, such as turning an arm into a blade, and many more intricate things than that as well. It can easily reform even after being damaged, by simply just moving itself back together, although it being injured at all isn't too likely. 

Attack - Mercury is a heavy liquid in room temperature (unless Kai decides to change it), and it posses great kinetic energy when moving rapidly under high pressure. It can be manipulated into shapes like whips, spears, and blades at will, and its sharpness can even overwhelm laser rays. Nothing can be said to be unbreakable before it, allowing it to destroy the most solid defense. Compressing itself into a thin edge a few millimeters thick before striking, its blade rivals pressurized water jet cutters. The mercury blade can cut through any solid defense as if cutting through tofu, even should it be titanium alloy or diamond. His command of Scalp (斬, ?) against a barrier causes it to change into a long and thin ribbon in the shape of a whip that strikes out at the target with a whipping motion, and against a living target, two whips can strike in a pincer motion to cut at the target from both sides. It also acts according to his state of mind, such as randomly attacking everything in sight while he is agitated.

Defense - Upon activating Volumen Hydrargyrum's automated defense mode, it instantly responds to anything that can threaten Youkai and defends appropriately. While it is meant to be able to absorb Gandr shots, deflect magic swords, and break through supernatural fire, ice, and lightning, it can also protect against modern weaponry with ease. It creates a protective membrane when infused with his prana, with surface tension that is far superior to steel even when barely a millimeter thick. It can react in a split second to defend against magical flames and mist, gunfire, mines, and well, you get it by now, basically anything. Projectiles are reflected and rendered ineffective no matter if he is attacked from the front, surprised from behind, or surrounded on all sides.

There is another form of defense that can be used, activated with Fervor, mei sanguis (Boil, my blood.), that creates a large number of spikes in front of Youkai that reach as far upwards and downwards as they can go, resembling a bamboo forest. The membrane is useful against magical attacks, but projectiles only need to be stopped from proceeding in a straight line to render them harmless. Creating the columns requires a much greater energy expenditure than the membrane, as each spike that has been twirled to be as thin as steel wire must be given the strength and malleability to deflect powerful projectiles. This action pushes him to the limit to create an impregnable fortress that easily causes projectiles to ricochet within the gaps of the spikes while not allowing them to reach Youkai. Their defense against a stronger projectile is much greater than the membrane, and they can quickly close around the attack to become a single column that closes the attack off completely.