The Regiment Hex (魔女連隊(レギメント・ヘクセ) Regimento Hekuse?) was a former secret ops established by Heinrich Himmler in Nazi Germany. After deserting from IU in WWII, its remnants gathered together as a terrorist group in some unknown exiled country, doing dirty jobs for high pay.

It made and alliance to "Greneda" during the Far East Warfare.

Hidan no Aria World