Kamikaze Kaitou Jeanne (Novel)

By day, Kusakabe Maron is an ordinary high school girl with more than her share of problems. But by night, she is Kamikaze Kaito Jeanne, the reincarnation of Joan of Arc! Her mission: to hunt down demon-possessed paintings and exorcise the evil spirits! Too bad accomplishing this mission puts her into conflict with the authorities, who view her as a mysterious stranger vandalizing works of art. With only the help of angel-in-training Finn, she must survive high school during the day and battle evil by night!

(Source: CMX)