Ga-Rei (喰霊), is a Japanese manga series written and illustrated by Hajime Segawa. It has been serialized by Kadokawa Shoten in the magazine Shōnen Ace from 2005 to 2010 and collected in twelve tankōbon volumes. The English version was then released digitally on BookWalker on October 29, 2014. A prequel anime series, Ga-Rei: Zero, aired from October 5, 2008, to December 21, 2008, which details the backstory of key characters Kagura and Yomi.