The Organization, also referred to as "Vingulf" after the code name for their headquarters are a shadowy organization who are the primary antagonists of Gokukoku no Brynhildr.
The Organization are responsible for kidnapping and implanting young girls with alien parasites in hopes of raising a "Grane", a powerful alien entity capable of threatening the human race and all life on Earth. During the course of their actions, several infected humans, known as "witches" as they possess superhuman "magic" abilities as a side effect of the parasite, escape from an Organization convoy. These girls, including Kuroha Neko, Kana Tachibana, and later Kazumi Schlierenzauer and Kotori Takatori are rescued by series protagonist and normal Japanese high school student Ryouta Murakami.
The organization makes several attempts to recapture the girls, in particular Kotori Takatori, whose body houses the Grane, using other "witches" and conventional special forces, however, they are outwitted by Murakami and the girls in every attempt. In a final desparate attempt, Chisato Ichijuku deploys Mako Fujisaki in an attempt to capture the, but Mako escapes and goes rogue, causing massive destruction after she does. Meanwhile, Chisato successfully captures Kotori and attempts to awaken the Grane inside her.
The Organization are opposed by rival organization Hexenjagd.
- The Organization shares its name with a massive, antagonistic secret organization from the 2012 horror film The Cabin in the Woods.