Episode 16

"The Girl Can't Help It" is the 16th episode of Kill la Kill.

Synopsis
The Tri-City Schools Raid Trip is returning to Honnouji Academy, when Satsuki Kiryuin is unexpectedly summoned home. Meanwhile, Ryūko begins to learn the truth behind the series of events that brought her and Senketsu together.

Plot
Satsuki Kiryūin returns exhausted to her mansion to recover from her battle with Ryūko Matoi. It is revealed that transforming for long periods of time puts great stress on Satsuki. Nevertheless, impressed by her daughter's prowess with Junketsu, Ragyō Kiryūin shows Satsuki a chamber in their mansion containing the original Life Fiber, an extraterrestrial entity that produces parasitic fibers to feed on mankind. She then instructs Satsuki to organize a school festival as the final step in her plan to distribute Life Fibers within clothes across the world.

Meanwhile, Aikurō Mikisugi and Tsumugu Kinagase guide Ryūko and Mako Mankanshoku to an undamaged section of their underground base. Aikurō reveals that Life Fibers are what induced humanity's evolution into Homo sapiens and the instinct to wear clothes. He further explains that Isshin Matoi founded Nudist Beach and created Senketsu for Ryūko to wear and fight the Kiryūins when she came of age, as she displays a high resistance to Life Fibers. Ryūko becomes outraged that Nudist Beach sees Senketsu as little more than a weapon and takes him off, refusing to let him kill his own kind. Deeming them of no more worth, Tsumugu prepares to kill Ryūko and Senketsu.

Characters

 * Ryūko Matoi
 * Senketsu
 * Aikurō Mikisugi
 * Tsumugu Kinagase
 * Mako Mankanshoku
 * Satsuki Kiryūin
 * Junketsu
 * Ragyō Kiryūin
 * Rei Hōōmaru
 * Nui Harime
 * Shirō Iori
 * Mitsuzō Soroi
 * Takiji Kuroido
 * Ira Gamagōri
 * Hōka Inumuta
 * Uzu Sanageyama
 * Nonon Jakuzure
 * Isshin Matoi