Omamori Himari

Omamori Himari (おまもりひまり, "Protective Charm Himari"), also known as OmaHima (おまひま) for short, is a Japanese manga series written and illustrated by Milan Matra. The story revolves around Yuto Amakawa, an orphan who, on his sixteenth birthday, meets Himari, a cat spirit samurai girl who has sworn an oath to protect Yuto from the various monsters and demons that are out to kill him. A 12-episode anime adaptation by Zexcs aired in Japan between January and March 2010.

The Cat in the Approaching Darkness (Episode 9)
Yuto is kidnapped by Ageha at a power station who then put him to sleep so she could drink his blood.