Mayuri Kurotsuchi (Njalm)

Mayuri Kurotsuchi (涅 マユリ, Kurotsuchi Mayuri) is the Captain of the 12th Division in the Gotei 13 and 2nd president of the Shinigami Research Institute. His lieutenant is Nemu Kurotsuchi, his artificially-created "daughter".

Appearance
Mayuri's appearance has a skeletal-like look to it with a skull-like visage. His face is painted entirely white with the inner portion of his face painted black with the exception of his nose. His eyes are a golden color and he constantly bares his teeth giving the appearance of him constantly smiling. Both his ears are seemingly replaced with stubbed golden cones. His fingernails are blue and, with the exception of the fingernail on his right middle finger, are all short. The one long fingernail is as long as the finger itself. He also wears a white hat with two ends that point to his right and a large purple scarf around his neck. His whole body, even his face and hands, has been painted black and white. He repaints his make-up every morning, as he always removes it before going to bed.

Mayuri is revealed to have blue hair and honey gold eyes when without make-up.

Upon entering Hueco Mundo, Mayuri reveals a new look: his face paint had changed with him creating a black cross upon the center of his face covering everything but his nose and a small portion of his lower chin. His ear attachments have become shorter and rounder but wider, his chin has a long golden attachment reminiscent of an Egyptian Pharaoh beard, his teeth have become a golden color, and he no longer wears a hat as there is a golden frame around his face. His hair is also styled into "horns," that slope down from the top of his head and frame his face, which when viewed from the front looks much like a Pharaoh's crown.

17 months after Aizen's defeat, Mayuri displays another new look. The black face paint covers much of his face, leaving thin white lines going up his face and a white nose. He wears a long, golden headdress which curves back to his mid back. Underneath his chin are two opposite facing strands from the mask. On the backside of the headdress the Twelfth Division symbol is painted.

110 years ago Mayuri's appearance was similar to his current appearances but with minimal details. He was still largely painted white except for the black paint which was arranged around his eyes like a large domino mask. He had gold cones covering his ears and blue hair combed back on the top of his head.

Personality
Mayuri Kurotsuchi is a researcher and personifies the stereotype of the mad scientist. By his early actions during the Ryoka Invasion, he is displayed as sadistic and cruel. He sees everyone and everything not as a living being, but as an object to be researched—including himself. He has little respect or regard for most others, and was even willing to turn his own men (who were not aware of his plans) into living bombs in an attempt to capture Uryū Ishida and Orihime Inoue for experimentation. He also withheld vital information about the Bounts from the other Shinigami in order to capture one as a research subject for himself. However, while he usually shows disregard for life, he has been known to warn people of possible dangers when they present themselves.

It is known that Mayuri's favorite food is pike fish, and that he does not like onion. One of his free-time activities is reading every character published in Seiretei Communication. He himself publishes a serialization in the journal, titled "Effective Medication for the Brain", which apparently contains detailed instructions on preparation of medicine and their application. Surprisingly, it is highly popular among the readers.

In battle, Mayuri likes to toy with his opponent, torturing them little by little until they can hardly stand. This was shown in both the fight with Uryū and his Espada counterpart Szayelaporro. Every time he fights he uses it as an experiment testing himself and his opponent little by little. He also uses it as an opportunity to implant microbes or other things in case they get away. Before engaging, though, he will make extensive research on his possible opponents to tilt the chance of winning in his favor. It is seen that, before the Winter War, he is busy reading in the library with a note on the door saying, "Enter and Die." He's shown to be doing this every time before he fights, against both the Bounts and the Espada.

Inventions
As a leading researcher in Soul Society, Mayuri has developed a number of unique items. The notable ones are below:
 * Nikubakudan (肉爆弾, "Flesh Bomb"): Mayuri has developed biological bombs that he has implanted into the bodies of his own subordinates without their knowledge. By using a remote detonator he can set off the bombs which use every biological portion of the body causing devastating explosions that can seriously damage the surrounding area.
 * Hojiku-Zai (補肉剤, Flesh-mending Drug): Mayuri has also developed a "regenerative serum," which can regrow limbs upon injection, and looks like some sort of green chemical. He used it to regenerate his arm when he fired it off as a grappling hook, and complained about the side-effects of pain that the serum caused. It can also be used to heal less severe injuries, as seen with Uryū and Renji.
 * Gigai Specialization: However, one major invention is present, which is Mayuri's lieutenant and so-called "daughter," Nemu Kurotsuchi, who is the ultimate result of his Gigai and Modified Soul research. The fact that Nemu can survive toxic poisons, a pierced lung, and having all of her nutrients robbed from her, is a testament to Mayuri's own skill in Gigai creation and modification.
 * Bount Sensor: He also creates a simple Bount sensor in the Bount arc of the anime. Though not as powerful as Kisuke's equivalent mod soul versions, it is far more effective once properly calibrated.
 * Zanpakutō Repair and Modification: Mayuri offers a catalogue of Zanpakutō related services that include repair and gender reassignment.
 * Data-gathering Bacteria: He also implants opponents that escape from battle with data-gathering bacteria so as to monitor them afterwards, as was the case with Uryū during their fight. This was how he was able to counter Szayelaporro's Voodoo Doll technique -- Using the information gleaned from the bacteria he had implanted within Uryū, Mayuri was able to quickly conceive and carry out an operation to safeguard himself and his lieutenant beforehand.
 * Fake Karakura Town: One of his greatest achievements is the creation of an exact replica of Karakura town, as he and his division are the ones responsible for its creation.
 * Superhuman Drug (超人薬, Chōjin'yaku) Mayuri has manufactured a "superhuman drug" that can slow down a person's perception of time. The drug is kept in a bottle by him, but also inside Nemu's body, which is blue in appearance. It is able to make one second seem like 100 years for the unfortunate victim to whom it is administered. An undiluted dose of the drug causes the senses to speed up trillions of times while the relatively "slow" body fails to keep up, resulting in paralysis; on the other hand, it is implied that a diluted dose of the drug can greatly enhance the user's reaction speed. He even stated that a single droplet would have to be diluted 250,000 times to be suitable for use.
 * Anti-Arrancar Mine: After rescuing Uryū from Szayelaporro, he gives Uryū a landmine he designed which is meant to be effective against Arrancar. Once its sensors pick up an Arrancar's reiatsu, it detonates violently. Uryū subsequently used it on the Espada Yammy Llargo, with the effect of critically injuring the Arrancar in his sealed state; the explosion was very powerful.
 * Garganta: The technique used by Hollows to move to and from Hueco Mundo. It literally tears open the dimensional fabric separating the worlds, revealing a tunnel of whirling, torrential energy that must be focused and solidified to create a discernible pathway. Mayuri recently learned how to use this ability after researching within Las Noches.


 * Thought Inhibitor Drug: Mayuri concocts a special drug which can stop thought processes from occurring within the brain. Stored in a purple vial, it can be injected into an individual via Mayuri's Zanpakutō. This drug restricts the individual's control over all motor functions, as is the case when Kagerōza Inaba is rendered unable to evade a simple attack from Mayuri. It also can cause the individual's emotions to go out of control. This drug causes the affected individual's eyes to glow with a purple tint.

Powers & Abilities
Genius Intellect: Body Modification Expert: Mayuri has done extensive research on modifying bodies, and he has upgraded a variety of his own body parts to function as weapons or otherwise provide him with useful abilities.
 * Nikushibuki (肉飛沫, "Flesh Splash"): When Mayuri's stabs himself with his Zanpakutō while in its sealed state, it has the ability to transform Mayuri into a liquid form. Doing so doesn't kill him, as it is a last resort technique, but instead simply leaves him unable to attack or be attacked, making it an effective escape tool. He commonly can move around in this form and speak as well. He reforms after a few days but without any of his previous body modifications. This ability is a result of the extensive level experimentation's he has done on himself.
 * Jabarakaina (蛇腹腕, "Snake Belly Arm"): His left arm can extend out like a grappling hook. When the arm is attacked it explodes on impact, but with his regenerative serum, this is not a problem (though it does cause him serious pain).
 * Hidden Kusarigama: He is able to pull part of his ear out to form a scythe attached to a rope-like ligament for use as a kusarigama. It is easily as sharp as a standard Zanpakutō, and he is quite skilled in its use.
 * Nisehada (贋膚, "False Skin"): Another one of Mayuri's abilities likely achieved scientifically is his ability to meld with the color and texture of the environment. It was shown when he was attempting to track the Ryoka in Soul Society. When he reveals himself, the topical camouflage flakes away.
 * Organ Replacement Surgery: Most impressively, he has demonstrated the ability to replace functional internal organs with false ones, a feat he performs on himself and his lieutenant to safeguard them from injury. This particular operation is conceived of and carried out in the span of less than an hour.
 * Tracking Expert: He expresses the fact that he merely needs a strand of a person's hair to find them. By using a simple chemical process he can discern the location of the person in question using their DNA as a reference.

Great Spiritual Power: Expert Swordsmanship Specialist: While not masterful in swordsmanship as some other captains, Mayuri is skilled enough to hold his own in a fight. His expertise with his Zanpakutō lies in his effective use of its abilities while its in either its Shikai or Bankai release states, rather than his swordsmanship skill. He relies on those abilities or his pre-planned strategies rather than actually engaging in melee combat with his opponent. Mayuri seems to be ambidextrous, as he wields his Zanpakutō in his right hand and his scythe-ear in his left (often simultaneously).

Shunpo Expert: