Ninja

A Ninja (忍者) is a term referring to a type of covert agent or mercenary that existed in feudal Japan. However, it has been referenced that some ninja clans still exist in modern times with some now operating globally.

Background
The Kouga and other ninja clans have been operational in the shadows for a long time and have managed to continue doing so even into the 21st century to varying degrees. Recently, due to changing times, the groups have been looking into Academy City's Power Curriculum Program and Gemstones, and, as such, have been seeking to obtain the means to develop genuine supernatural powers. Though they do not seem to have any awareness of the existence of the Magic side.

List of Known Ninja

 * Hattori Hanzou
 * Kuruwa
 * Kouga School
 * Asai
 * Oumi Shuri
 * Sakata
 * Sugitani
 * Yasu