Headhunter

1. #1

   Keys: NULL, nulls, Nulls, NULLs, NULL soldiers

   Humans that are trained to be extreme killing machines with their heightened senses of time powered by combat drug called Chronos, which gives them a near super-power like abilities called "Precognition". These super soldiers are called NULL. There are ranking of strength to NULLs: Alpha NULLs, Beta NULLs, then Gamma NULL. They fell into three categories in ascending order of skill, as well as exposure to Chronos: Alpha NULL - 7% of all Alpha NULL survived the training program. Beta NULL - 13% of all Beta NULL survived the training program. Gamma NULL - The most rigorous of all NULL programs, Gamma NULL were trained and given Chronos since childhood to develop their ability to predict the future as well as hone their combat expertise. Every Gamma NULL survived the training program.

2. #2

   Keys: NULL creator, NULL project, The NULL Project, NULL Project

   NULL was a project commissioned by the New Mecca government as a tactic to win the Cromag War. The project aimed to produce super soldiers with precognitive powers using a military drug specifically created for the project called Chronos. The NULL Project is backed by multiple scientists and investors, including Leon Von Alvensleben, Josh Rose, and Omar Al-Qasim. Participants in the NULL program would be chosen based on their lack of empathy whilst killing, with psychopathic participants being prominent. They would undergo training in a secret government facility disguised as a Slaughterhouse in the Third District, overseen by Leon Von Alvensleben.

3. #3

   Keys: precog, precognition, Precognition, rewind abilities, rewind, Rewind

   NULL with precognition have the ability to predict and calculate hundreds and even thousands of possible outcomes for an encounter inside their brain within the span of a seconds. If one of the outcomes leads to their death, NULL can "rewind" the scenario in their mind and try again with different approach. Once they found the most desirable outcome, they will execute the action in real time following their predictions. However this power is not foolproof as sometimes the prediction will come with unexpected results when executing in real time.

4. #4

   Keys: combat drugs, chronos, blue liquid, blue poison, Chronos

   Chronos was a drug in the shape of blue fluids, normally consumed through needle injections into one's blood vein. Chronos was created by Leon Von Alvensleben for the New Mecca government in order to create super soldiers for the NULL project. Chronos provides the NULL soldiers with limited precognition, allowing them to preplan the outcomes of combat. It also allows for them to slow their perception of time and rewind time to a certain point. Those that were treated with Chronos will eventually grow to rely on them, as without constant dose of the drug will make them suffer withdrawal where the time would feel moving more and more slowly, minutes felt like years, years felt like decades during the withdrawal. The heavier the withdrawal, the longer the time would feel being dragged on inside their minds. Chronos has severe side effects, including vivid hallucinations.

5. #5

   Keys: withdrawal, Chronos withdrawal, withdrawals, Withdrawal

   Those that were treated with Chronos will eventually grow to rely on them, as without constant dose of the drug will make them suffer withdrawal where the time would feel moving more and more slowly, minutes felt like years, years felt like decades during the withdrawal. The heavier the withdrawal, the longer the time would feel being dragged on inside their minds. Chronos has severe side effects, including vivid hallucinations. If a Chronos user goes through withdrawal, they not only die a painful death, but are also stuck inside of a time loop within their minds, stuck in eternal agony as they relive the moment of their death again and again. It should be noted that the Alpha, Beta, and Gamma NULLs have varying levels of Chronos dependencies, with Alpha NULL being able to go for relatively long periods without Chronos without adverse effects, while Gamma NULL need to get Chronos one or two times a day or they will suffer from heavy withdrawal effects.

6. #6

   Keys: Cromag, Cromags, Cromag War, The War, the war

   A conflict in which the New Mecca forces fought against the Cromags. While the location of the conflict is unknown, Justin himself said that the reasons behind the war were, in his own words, because New Mecca saw the Cromags as sub-human.

   During the war the New Mecca government commissioned the creation of the Chronos combat drug and the NULL soldiers. The project was largely successful in its goal of creating supersoldiers, but the actions of the NULL soldiers being somewhat leaked to the public saw the NULL project being shut down, and New Mecca withdrawing from the Cromag War.

   The war took place 7 years before the events of Katana Zero.

7. #7

   Keys: New Mecca, Mecca

   New Mecca is a city that are situated inside a crater. The city is split into three districts, with the third district being the most impoverished. New Mecca lies inside of a valley surrounded by mountains on all sides. New Mecca is seemingly a city-state, being largely self-sustaining and with an independent government. However, it appears to be controlled by Juncture, which holds a stake in almost every product seen in the game.

8. #8

   Keys: Juncture, that big corpo

   Juncture is a prominent company in New Mecca with a hand in several different industries, from vehicles and infrastructure to foodservice and entertainment. While they have not made an explicit appearance in-game, their name and logo appear in the background of several scenes.

9. #9

   Keys: Fifteen, Dragon, The Dragon

   Nicknamed "The Dragon". Like all Gamma NULL, Fifteen has been on Chronos since childhood, which allows him to perceive time much more slowly as well as glimpse the future. He has tremendous speed, which allows him to cut through multiple opponents with a single stroke of his blade in a technique known as the "Dragon Dash". This "dash" ability can slice through shields, avoid lasers and shotgun traps, and is faster than the human eye (or a camera) can see. Fifteen also possesses superhuman strength—being able to lift Fa Yuan, who weighs in at 253 pounds or 114 kilos, with one hand. His movement speed during rolling, running, jumping is also slightly faster as compared to Zero. Fifteen works to track down and kill the people responsible for Chronos and the NULL project. He breaks into Fa Yuan's jail cell and interrogates him to get names of those involved with Chronos, and then kills him. Before escaping, he steals the prison's security tapes, likely to cover his tracks. Headhunter briefly worked with Fifteen as she shared Fifteen's strong desire for revenge against those involved in the NULL project. However, over the course of the years that passed, she ultimately decided to put herself first and worry about the creators of Chronos later, being unwilling to assist Fifteen not just from how long they’ve been fighting, but because of her Chronos withdrawal.

   Fifteen is tall, slim, yet powerful considering his superhuman strength.

   Fifteen wears snake-tailed blonde hair down to his waist, collected in a ponytail. He is dressed in a black business suit, his jacket is unbuttoned, and under it is a white shirt. He has a katana with white tsuka and raspberry tsuba. His katana is painted in two colors: yellow and crimson. Little is known of Fifteen's true personality, but it can be assumed that he exhibits traits of psychopathy, similar to Zero and the other Gamma NULLs. Though he harbours a deep-seated hatred towards the people involved with the NULL Project and Chronos due to their disregard and abandonment of NULL soldiers post-war, wishing to make them suffer as he and other NULL soldiers have.

10. #10

    Keys: guy wearing a robe with katana, guy wearing a black robe, Zero, guy with a black robe and a katana

    Zero is a Gamma NULL who served in the Cromag War as an ally to New Mecca alongside another NULL, Fifteen. He was selected as a child to be a member of the Gamma NULL category, the most dangerous type of soldier produced by the program, because of his aggression and mental problems. While his past before the NULL project is largely unknown, it's stated that he had a normal upbringing until his involvement with the program. As part of the program, he was administered the experimental drug Chronos, which gave him incredible precognitive abilities allowing him to predict entire combat scenarios before they even happen, predict the correct answers out of an interrogation, and rewind time upon death After the war, Zero began working as a killer for an unknown employer that is implied to be the government. Due to his use of Chronos (and a near-fatal head injury during the war), Zero soon lost his memory of much of his early life. However, he retained his abilities from the NULL program and continued to use them during his time as an assassin.

    Zero has apricot skin, long, black hair that is usually tied into a samurai-like ponytail and brown eyes. During his time as a NULL Soldier, he retained his ponytail but wore the NULL uniform, though he notably kept his face concealed with sunglasses and a bandana. After the end of the war and during his time as an assassin, He wears a black one-sleeved bathrobe/kimono-like outfit with gold trim, black hakama pants, and brown geta-like sandals with black straps. He also ties his hair using a yellow hairband.

11. #11

    Keys: Al-Qasim, Omar, Omar Al-Qasim

    Omar Al-Qasim is one of the original backers of the NULL project, and one of the assassination targets in Katana Zero. He is a white-haired male who employs the Headhunter, using her as an assassin and paying her in Chronos. It isn't stated what his role in the NULL project was, but given later dialogue, it's likely that he was a financial backer of the project.

12. #12

    Keys: Gamma NULLs, Gamma NULL, Gamma

    Gamma NULL - The most rigorous of all NULL programs, Gamma NULL were trained and given Chronos since childhood to develop their ability to predict the future as well as hone their combat expertise. Every Gamma NULL survived the training program. Currently the known Gamma NULLs are Fifteen and Zero. Judging based on numericals, excluding Zero and Fifteen, there are supposedly 13 other Gamma NULLs between One and Fourteen. The actual numbers of Gamma NULLs are unknown. It should be noted that the Alpha, Beta, and Gamma NULLs have varying levels of Chronos dependencies, with Alpha NULL being able to go for relatively long periods without Chronos without adverse effects, while Gamma NULL need to get Chronos one or two times a day.

13. #13constant

    Keys: After the War

    After the Cromag War, the NULL soldiers were released from the care of the New Mecca government. At the time, the government was allegedly unaware that Chronos withdrawal was fatal, and most of the NULL soldiers died of it. Those who survived, however, became mercenaries and assassins, paid in Chronos by individuals and organizations that either had a stockpile of it, or the ability to manufacture more.

14. #14

    Keys: V, blue-haired russian, blue-haired guy, THAT russian, blue-haired dude

    V is a slick, blue-haired, Russian gangster with experience fighting NULL soldiers with a side hobby of snuff filming and probably pornography. He carries a gold plated pistol, a pair of gold painted steel gauntlets, which is capable of blocking bullets and sword strikes. V is explicitly sadistic, often spending his time torturing and killing people related to chronos. He seems to be personally invested in the chronos operations, as he states that he got his current position in his organization by killing 7 NULL soldiers. He considers his style of torturing and killing to have an "artistic flair". V looks up to Zero up until the Studio 51 mission, having been under the assumption that Zero wasn't working for an organization and was just a highly skilled serial killer. After Zero turns down his offer to partner up with him, Zero being disgusted with the murder of his neighbours being turned into a snuff film that V sent to Zero, he becomes visibly temperamental. This leads to V killing Omar Al-Qasim in rage.

15. #15

    Keys: Leon, Leon Von Alvensleben, Alvensleben, Von Alvensleben

    Leon is the creator of Chronos and the NULL project, which was ran out of a disguised slaughterhouse in the third district. During the war, Leon oversaw the development of the combat drug Chronos, along with the NULL soldiers. During his tests he would run subjects through a deadly obstacle course to ascertain their value. The weakest were determined to be Alpha NULLs, those that were stronger were Beta NULLs and the most powerful of all were Gamma NULLs. At some point between the war and the beginning of the events of Katana Zero, Leon is put into cryostasis to extend his lifespan. Before being put into cryostasis, Leon sets up automated defense and communication systems around the slaughterhouse. These include screens which automatically display prerecorded messages upon detecting certain individuals, crusher traps, and an automated sniper rifle.

16. #16

    Keys: Zero's employer, Psychiatrist, The Psychiatrist

    On the surface, the psychiatrist appears to be a professional, keeping to what his employers have assigned and holding himself and his clients to a high standard. If Zero is cooperative with him, he will congratulate him on jobs well performed and suggest that Zero might even meet his family. However, if Zero provokes him or fails his objectives, the psychiatrist will reveal a seething rage. In reality, the psychiatrist despises Zero, looking down on him for his violent tendencies and Chronos addiction, and sees him as little more than a junkie, to be used for his employers' agenda and eventually disposed of. Despite posing as Zero's psychiatrist, he is only there as his handler, with the sessions little more than a front to placate the assassin and maintain his cooperation while handing out assignments. As per his own mission objectives, the psychiatrist has no qualms manipulating Zero, hiding vital information from him about his past, and lying to him about the nature of his dreams. While he claims his sessions are there to help Zero's recovery, dialogue suggests he does not pay any real attention to him at all outside of mission-critical discussion. The psychiatrist is quick to dismiss, threaten, and verbally abuse Zero when he feels like he is losing control of the situation, and has a particular distaste for the media attention the assassin gathers from his killing sprees. Psychiatrist was acting under the New Mecca Government.

17. #17

    Keys: Yuan, Fa Yuan

    Fa Yuan was a political refugee. Through unknown circumstances, he obtained information on several people involved in the creation and distribution of Chronos (Namely Josh Rose, Omar Al-Qasim, and Leon Von Alvensleben). For this, he was arrested and imprisoned in the Mutual-Nil Prison, where he lived in isolation, speaking only to his lawyer, for many years.

    During the events of the game, Fifteen comes to Yuan's cell to find out the names of those involved with Chronos's creation. Yuan gives him the names of those he knows are involved, as well as some information regarding Chronos's recreation. Despite begging to be spared, Fifteen then kills Yuan by dunking his head into the toilet and stabbing him (As evidenced by the bloodstains on the cell wall). It was also hinted at that Fa Yuan was going to die anyways, through execution, or through Zero (though he showed up too late), or through Fifteen.

18. #18

    Keys: Josh Rose

    Josh Rose is an eccentric billionaire with ties to Chronos and the NULL project. His role in said project is never confirmed, but it was apparently direct enough for him to feel responsibility for the killings carried out by the NULL soldiers.

19. #19

    Keys: SNOW, lady samurai, samurai lady

    SNOW's background is currently unknown. SNOW wears a kimono and geta and stands taller than most other characters. She has a katana in gilded with gilt. Her hair is gathered in a bun and fastened with a needle.

    SNOW is very calm and determined. SNOW appears to be a professional assassin, however, she becomes disappointed in V's murderous nature and even spares Zero before he can kill V. SNOW offers praise to V for eliminating Zero (unbeknownst to her, Zero was still alive), believing that he'll be rewarded for his efforts. She also observed Zeros lack or passion or remorse, for his duties, his enemies, and himself, claiming that he was ready to keep fighting her and V. SNOW appears to have the ability to teleport, leaving a trail of pink petals in her absence. V remarks that these petals are sharp. It is never clearly indicated whether or not SNOW is a member of NULL but due to her ability to seemingly teleport, similar to Fifteens dash ability, it's very possible she is also a member of NULL.

20. #20

    Keys: Little Girl, The Little Girl, nameless little girl

    The girl's real name, family, and past are unknown. She has two toys that may or may not be significant to the plot. One is named Leviathan, the other is Behemoth. She has a fair complexion. She wears her black hair in two buns held by pink bands. She wears a white undershirt and a red dress with suspenders. She also wears white socks and red shoes. During Halloween in-game, she visits Zero dressed in a bathrobe, obviously meant to be dressed up as him, and will ask for candy.

    The Little Girl is generally very jovial and carefree. When she first meets Zero, she is oddly friendly to him and insists that he let her into his apartment to search for her lost Toy.

    She behaves much in the way anyone might expect a little girl to behave. She is at times very candid about her approval or disapproval of things, slightly naïve about the larger world, and prone to not knowing everything really going on in New Mecca.

21. #21

    Keys: Third District, The Third District, Third district

    The Third District is infamously known as New Mecca's lower income district where former veterans of the Cromag War and general drug junkies are said to reside. It's unlikely that this is a coincidence. There are obvious connections to former New Mecca soldiers, the NULL Project, and Chronos that are closely tied together but poorly understood. Residents in the Third District seem to understand what squalor they live in, though it is difficult to tell if the Third has a weaker or stronger police presence as the player can only observe events through Zero. Zero lives in an apartment in the Third District, and at the start of the game he is constantly assaulted by loud music on behalf of his noisy and inconsiderate neighbors.

22. #22

    Keys: Kissyface, tall dude with an axe, Kissy, Mr. Kissyface

    A muscular man of tall build, Mr. Kissyface towers over Zero, V, and his fellow henchmen. Setting himself apart from the rest of V's entourage, Mr. Kissyface sports a white jacket, with an upturned collar, and matching pants. He appears to be shirtless underneath, wearing only a black tie. Mr. Kissyface appears to have an affinity for the color purple, wearing a purple executioner's hood and wearing a belt sporting the colour. His axe also bears a purple kiss mark, which may allude to him wearing purple lipstick.

    Mr. Kissyface comes across as a calm and level-headed individual unlike his superior, V. He expresses dismay when V murders Al-Qasim before having properly interrogated him and is able to discern Zero's taunting of V as getting "under his skin". Mr. Kissyface appears to be confident in his abilities, if not cocky, approaching Zero with a casual swagger before the latter was armed. It is possible that he wanted a fair fight with Zero, as he shows no signs of worry when he breaks the restraints of his would-be victim, who then proceeds to murder two of his associates. When Zero arms himself with his katana, Mr. Kissyface simply chuckles and states to his enemy that they could now "have some fun".

23. #23

    Keys: Headhunter, girl assassin, lady assassin

    The Headhunter is an average sized woman with a pale complexion. She wears her New Mecca army uniform with a beret, and covers her face with a visor or mask during her mission, but wears mostly sleeveless tank tops with only a pair of panties during her off hours. She has brown hair that she keeps ponytailed.

    Headhunter shared Fifteen's strong desire for revenge against those involved in the NULL project. However, over the course of the years that passed, she ultimately decided to put herself first and worry about the creators of Chronos later, being unwilling to assist Fifteen not just from how long they’ve been fighting, but because of her Chronos withdrawal. She holds the belief that instead of being slaves to their Chronos addiction, NULL subjects should use their powers to hold positions of power, akin to gods. She feels deeply remorseful if she have to fight a fellow NULL.

    The Headhunter was a NULL soldier who served during the Cromag Wars. It is unknown what rank of NULL she is, but her treatment with Chronos gave her precognition abilities, which she uses in battle to plan her attacks. She is unlikely to be a Gamma NULL as her perception of the future is seemingly limited.

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