Mugen Spiral

from tokyopop: yayoi, a spunky high school girl, has inherited spiritual powers from her mother, and she uses these powers to protect people. during a fight with the devil ura, yayoi's power turns the devil into a black kitten. now, even though ura doesn't hide his desire to “eat” yayoi's power when he gets the chance, they develop an interesting relationship: the two begin living together, and yayoi takes her new feline “friend” on her adventures.