The first Life Fiber that fell to Earth millions of years ago. Currently under the control of the Kiryuin family.
The Primordial Life Fiber was a primordial, extraterrestrial parasitic being that landed on Earth in ancient times. It was the source of all life fibers on the planet. As it couldn't feed off its hosts from the inside, it had to cling on from the outside, like clothes. Since then it manipulated human evolution to make them the ideal cattle to feast upon in later eons. It lay dormant for millions of years, before being discovered by the Kiryuin family. It's possible that it's actually many Liber Fibers living in a colony, rather than a single creature. The Kiryuin family took control the Primordial Life Fiber and made it into clothing, which they spread around the world.
Primordial Life Fiber is one of the antagonists of the Kill la Kill anime series that was produced by Trigger. It's directed by Hiroyuki Imaishi and written by Kazuki Nakashima. The character design was done by Sushio. The series first began in October 3, 2010.
Its first anime appearance was in Kill la Kill - Episode 16 "The Girl Can't Help it.
During the Cultural & Sports Grand Festival, the Primordial Life Fiber awakens and creates COVERS, which are released to consume victims. Nudist Beach and Satsuki's Elite Four discover that COVERS are connected to the Primordial Life Life by a thread, unless they are feeding off a victim. While Ryuko (under Junketsu's control) engages Satsuki's group, the entity prepares to cocoon the entire planet with the aid of Ragyo and Nui.