Main Data: Nui Harime is the secondary antagonist in Kill la Kill. She is the Grand Couturier of the Revocs Corporation, as well as the murderer of Isshin Matoi, from whom she took one half of the Scissor Blade. For this reason, she is the one Ryūko Matoi seeks to kill in order to complete her quest of vengeance. She is known for cute appearance and sadistic yet childish nature and incredible fighting power.
Appearance: Nui Harime seems to be a teenage girl of medium height. She has very long blond hair styled in drill-like pigtails, with smaller locks framing her face. Her eyes are sapphire blue, with highlights that resemble a smiling face.
Nui wears a richly adorned pink lolita-styled dress with matching boots and fingerless gloves. She accentuates her ensemble with a parasol, a large hair bow and a purple eyepatch, which covers the eye she lost in her battle against Isshin Matoi.
Her design has a prominent heart motif, such as on her collar, the center of her bow, her earrings, and even the highlights on her pigtails.
Personality: Nui demonstrates a very childish and cheerful behavior. She is always seen smiling, and acts, on the surface, very friendly with everyone, demonstrating excessive intimacy towards even Satsuki and revealing to Ryūko in a rather nonchalant way the fact that she killed her father. According to Ragyō, Nui is a free spirit and will do whatever she wants according to her whims. Her often bubbly behavior and nonchalance towards the feelings of others often makes her sociopathic, and playfully enjoys violence to a sadistic degree.
When she finds herself injured or outmatched, she becomes more frantic and aggressive, dropping all manner of her cheerful demeanor, which becomes more evident by the endgame after Ryūko cut off her arms. Nui is also known for holding heavy grudges, like Isshin for cutting her eye out and Ryūko for cutting both her arms.
Superhuman Physical Prowess - As a Life Fibers-infused human, Nui possesses immense physical strength, speed, reflexes, durability and endurance. She is able to handle herself exceptionally well in battle, being able to effortlessly fight against the Four Devas, who were all wearing enhanced, Three Star Goku Uniforms, fight on even grounds against Kamui-wielding fighters such as Satsuki and Ryūko and easily defeat the Nudist Beach forces. In spite of her natural strength, due to the particular nature of the Life Fibers infused to her, Nui is unable to don a Kamui, as it would have no effect on her.
Regeneration - As a Life Fibers/human hybrid, Nui can regenerate from any wounds and even lost limbs almost instantly, regardless of their severity. The only exception to this healing power is if Nui entire limb is cut with either the Scissor Blades or two weapons forged from Bazukan, as they nullify Life Fiber restoration.
Mon-Mignon Pr�t-�-Porter - One of Nui's unique skills allows her to create replicas of herself that can either fight her opponents or act as distractions. Although physically identical to Nui and possessing all of her abilities, the duplicates appear to be far less powerful than the original, relying mainly on their superior numbers.
Mental Refitting - Much like Ragyō, Nui can release Life Fibers from her hands that ensnare opponents and turn them into mindless puppets.
Shapeshifting Arms - For the final battle, Ragyō replaced Nui's lost arms with Life Fiber replicas that can alter their shape. During the final episode, Nui's new arms transformed into blades for melee combat and bat-like wings for flight.
Infiltration and Disguise Skills - Nui also appears to be extremely skilled when it comes to mimicry and infiltration. She was able to completely disguise herself as Shinjirō Nagita, disguising her height, hair style, gender and voice almost perfectly. She was also somehow able to create fake student data for Nagita, which appeared genuine upon inspection but disappeared immediately when she discarded her disguise. The only clue to her true identity that she apparently could not change was her eyepatch, which she instead covered up. In order to support her disguise she also used lifelike puppets to imitate the One-Star students chasing Nagita, indicating that she is also skilled at puppetry and ventriloquism.
Piloting Skills - Nui is also a skilled pilot, as seen when she hijacked Satsuki's personal helicopter and flew it back to the Kiryūin manor.
Master Sewing Skills - Being a Life Fibers/human hybrid and the Grand Couturier, Nui has a deep knowledge of how Life Fibers clothing is made, as demonstrated when she effortlessly spotted and removed Sanageyama's uniform's Banshi, dismantling the uniform. Likewise, she altered the Kamui Junketsu to be worn by Ryūko by sewing the Kamui's Life Fibers to Ryūko's own in order for the Kamui to possess her, making it extremely difficult for it to be removed from her body. She can sew high quality garments, especially Life Fiber based with ease, even after losing her arms as seen by her completion of the Shinra Koketsu.
Fingernail Hooks - The bottom edge of Nui's fingernails are lined with small hooks that can catch threads. She can use these hooks to grab and remove Banshis from uniforms.
Note: It is also of interest that of the characters shown in the series thus far, she is the only one to be capable of performing reality-warping feats such as leaning upon the characteristic large red text which forms her name, and completely disregarding the space separating her from Satsuki, allowing her to run her fingers through her hair as though they were standing eye to eye, when in reality, they were many meters apart. This is most likely for artistic effect for her character and not an actual ability.
Scissor Blade � Nui's signature weapon is one half of a giant pair of scissors, which she took from Isshin Matoi after defeating him. She wields the scissor as her main weapon, as one-handed, single-edged sword. The blade is capable of cutting Life Fibers, which are otherwise indestructible. Her skill with the blade is equal, if not superior to that of Ryūko's own.
Scythe Mode - Like Ryūko's blade, Nui can alter the shape of her Scissor Blade. During the battle on the S.S. Naked Sun, she converted her blade into a large, double-sided scythe. Apparently, this form can also increase the blade's power, as Nui intended to use it to sink the ship.
Razor Tape Measure - Nui used a measuring tape with retractable blades during her attack on Isshin Matoi's lab. It was destroyed by the Scissor Blades.
History: Nui was born about 17 years before the events of the series proper, following Ragyō Kiryūin's failed attempt to fuse her newborn daughter with Life Fibers. Concluding that a child born by a human could not properly merge with Life Fibers, Ragyō created an artificial Life Fiber womb from the mass of the Original Life Fiber, within which Nui was grown. Upon reaching her full development, Nui was raised by Ragyō as a servant of the Life Fibers, becoming the Grand Couturier of the Kiryūin Conglomerate (and of REVOCS as a whole).
Six months before the events of the series, Nui was sent to the Matoi Residence by Ragyō in search of Isshin Matoi's secret creation. After a short battle, Isshin unveiled the Scissor Blades to use against Nui. However, Nui overwhelmed the scientist and stabbed him repeatedly. Before she could deliver the final blow, Nui was distracted by the sound of Ryūko calling for her father, allowing Isshin to destroy her left eye with the purple Scissor Blade. Infuriated by this, Nui impaled Isshin to the wall with the red Scissor Blade, taking the purple blade for herself before planting a bomb in the Matoi Residence and making her escape.
Unbeknownst to Nui, her actions planted the seeds of defeat for Ragyō's ultimate plan. Not only did Isshin successfully trick her into ignoring his real secret project, Kamui Senketsu, but his last act in life would encourage Ryūko to take up the red Scissor Blade and seek out the one who killed her father.