Satsuki Kiryuin

* School uniform
* Junketsu Form

Satsuki Kiryuin is one of the wielders of Kamui, a type of clothing imbued with Getter Rays. Her clothes also use her blood to use her powers.

## Appearance

Satsuki is a tall, slim woman with an angular face similar to her mother's. She has thigh-length dark-blue tinted hair that has inward diamond-shaped bangs hanging over her forehead, blue eyes, fairly thick eyebrows and a large bust (although Mako Mankanshoku stated in her first head-to-head encounter with Ryūko Matoi that the latter had "bigger boobs"). She has the habit of perpetually frowning, although she does smile on rare occasions. Satsuki had long hair as a child, and while it was cut slightly shorter during her teen years, she grew it out later on.

## Personality

Prideful to say the least, Satsuki is an extremely intelligent, calculating and patient young woman while simultaneously unwavering and iron-fisted. Unlike with Ryūko and Senketsu, she had no shame in wearing the Kamui Junketsu in its most revealing form; she claims that her actions in donning Junketsu are, like the Kamui's name implies, "utterly pure". Satsuki refers to people as "pigs in human clothing", and justifies that the weak and foolish must be ruled. Due to her steadfast convictions, she also possesses a natural charisma and ability to lead others. In spite of her pride, Satsuki is shown to be pragmatic and determined, willing to cast aside pride and using whatever means necessary in order to secure victory, even if it threatens her life. When fighting Ragyō Kiryūin, Satsuki noted that her willingness to fight her mother and the Life Fibers was due to revenge, noting that great causes are born from personal desires.

In spite of her behavior at school, Satsuki is not heartless. While very harsh and not very willing to tolerate failures, she does care a great deal for the Elite Four; and is as protective of them (in her own hidden ways) as they are to her. As a child, she would always drink Mitsuzō Soroi's tea, in order to protect his feelings; despite disliking its bitterness for a long time, she eventually found it delicious. When she reminisces about this to Soroi, Satsuki, herself, notes that she must have been a kind-hearted girl if she'd gone that far to protect her butler's feelings.

Satsuki genuinely loved her father and her sister, enough to avenge them by attacking the mother who disposed of them. Likewise, despite a bitter, almost hatred-fueled rivalry with Ryūko for most of the series, Satsuki noticeably softens up to her when she learns that Ryūko is the sister she'd long believed to be dead.

## Story

Satsuki was the first-born child to Ragyō Kiryūin and Sōichirō Kiryūin where she soon became the first failed test subject of being fused with Life Fibers. However, after Sōichirō learned the truth about Ragyō, he knew that he would be punished if he betrayed her. He secretly taught a 5-year-old Satsuki about her mother and the secrets of Life Fibers. He then revealed that Junketsu will be her "wedding dress" before he took an infant Ryūko Matoi with him into hiding.

While in kindergarten, Satsuki was friends with Nonon Jakuzure, who knew what Satsuki was thinking and decided to join her in her resolve.

During her rise to power, Satsuki helped Ira Gamagōri save a boy who was being forced into jumping off the roof of Rinne-Dō Junior High, discovered Hōka Inumuta following his hacking into the Revocs Corporation's computer systems, and was impressed with Uzu Sanageyama's fighting skills. Upon Honnōji Academy being established, she became the school president with her followers becoming the Student Council's Elite Four.

When Ryūko Matoi arrived at Honnōji Academy and bonded with Senketsu, Satsuki snuck into her mother's house and bonded with Junketsu. She then challenged Ryūko and easily defeated her, proving herself to be the more capable Kamui wearer at the time. She later decides to use Ryūko to help her rebuild Honnōji Academy's structure from the ground up by letting her destroy all the students who came in her way and thereby only leaving the strongest. After a while she takes this a step further and announces the First Naturals Election where only the most capable students would rise to the top, this being the Elite Four and Ryūko. Her plan was interrupted however, by the unexpected meddling of Nui Harime who manages to make Ryūko go berserk and be consumed by Senketsu and Satsuki has to intervene to stop the girl from destroying everything on the premises, though Mako Mankanshoku calms Ryūko down before Satsuki is able to land a finishing blow.

After this, Satsuki announces the Tri-City Schools Raid Trip to take over the Kansai region, the only area outside her control. Though in reality her real objective was to flush out Nudist Beach from hiding, then to get control all Japanese schools and then schools of all world. But this plan is prevented by the newly appeared Dr. Saotome along with Shin Dragon. A conflict begins between them, for the capture of Getter Rays.

## Abilities

* **Natural Capabilities**
	+ **Physical Prowess** - Satsuki is accepted as the most powerful fighter of the Academy with almost superhuman physical strength, speed, endurance and reflexes. Her middle-school self was able to emit a fighting spirit capable of downing 500 men, and she was able to incapacitate Ira Gamagōri despite his superior size, age and with him wearing steel armor. Even when stark naked, and with her hands restrained, she still had enough skill and power to kill multiple COVERS using nothing more than her two altered toenails.
	+ **High Intelligence -** She is also highly intelligent and manipulative as seen by her plan to take down her mother and the various people she deceived and manipulated in the process. Likewise she demonstrated a strong sense of patience and willpower, to endure the capture and torture at the hands of her mother, while slowly planning an escape route and having the forethought to alter two of her toenails using the same material as her sword Bakuzan.

* **False Toenails**
	+ Satsuki also has two toenails made of the same material as the Bakuzan, which she can use just as effectively.

* **Kamui Junketsu** (?)
	+ **Life Fiber Override** ( *Jin'i Attō*?)

After her first clash with Ryūko, Satsuki donned the Kamui Junketsu and was able to force the blood-thirsty uniform to bow to her will. Her utter lack of shame at her appearance also allowed her to immediately attain Junketsu's Life Fiber Override and true form. Under Junketsu's power, Satsuki is granted incredible power, and even the smallest of attacks are capable of causing exceptional devastation. She is also capable of altering her Kamui's shape, as seen when she altered one of her shoulder guards into a drill to attack Ryūko. However, due to her inability to overcome the human race's resistance to the Life Fibers, she is unable to fully synchronize with her Junketsu, thus being shy of its full power and capabilities, while exerting greater pressure and fatigue on her body.
After Ryūko rips off Junketsu and being freed of Ragyō's mind control, Satsuki has Junketsu modified, such that it is infused with the blood of Ryūko and Mako, as well as the fibers of Senketsu, to tailor it to her needs. As a result, Junketsu now gains access to Senketsu's alternate forms while placing much less stress on her body.
* **Kamui Senketsu** (?)
	+ **Life Fibers Synchronize** ( *Jin'i Ittai*?) – After Ryūko is brainwashed by Ragyō and forced to don Junketsu, Satsuki wears Senketsu to combat Ryūko. She states that even though Senketsu may dislike her, only she and him can stop Ryūko. While transformed, Satsuki is shown to be able to use all of Senketsu's alternate forms such as Senketsu Senjin and Senketsu Shippu, although not at their full power.
	+ Ryūko has stated that Satsuki and Senketsu are not truly synchronized, and Satsuki is merely commanding Senketsu to do as she says. Despite this, Senketsu acknowledges that Satsuki and its heart are one with the desire to bring Ryūko back to her senses. Senketsu is eventually shredded apart by Ryūko, but reforms itself in time to protect Mako.
* **Secret Sword Bakuzan** ( *Hiken Bakuzan*?) Satsuki is a master swordsman who wields the Bakuzan, a black-bladed katana in a white sheath with an edge that is claimed to be keener than Ryūko's Scissor Blade. Its strength is so great that one slash is enough to damage a transformed Kamui. While durable enough to clash with Ryūko's Scissor Blade on their multiple battles, the Bakuzan was eventually broken when clashing against Ragyō's fist.
	+ **Bakuzan Gako and Bakuzan Kōryu**
		- **Swordsmaster -** Bakuzan was a special sword capable of severing Life Fibers, that was noted by Satsuki to have a sharper edge than that of a Scissor blade. It was eventually broken in half in the battle against Ragyō. The shards are eventually reforged into Bakuzan Gako and Bakuzan Kōryu, a long blade and short blade respectively, which are given to Nonon and Ira Gamagōri respectively. Bakuzan Kōryu is then passed onto Uzu, as Gamagōri claims that he is more proficient with blades. Both blades are returned to her by Sanageyama and Jakuzure. Now holding two blades, their effect is the same as the twin Scissor Blades, being capable of damaging Life Fibers beyond their regenerative powers. Satsuki's skill with these blades is extensive and adaptable, as she has gone toe-to-toe against various other sword wielding opponents.