Kamikaze Kaitou Jeanne is very pretty anime from Arina Tanemura.

Maron is 16 years old girl that has friend named Miyako. But in nights, Maron transforms to Kaitou Jeanne (Jeanne D'Arc) to collect demons. If Maron doesn't do that, the humans that are suffering because of the demon will die. And so Maron collects demon with the angel Fin.

And of course, Miyako's father is a Decetive and thinks Jeanne is a thief, so he tries to capture her. In one day, Maron meets Chiaki, the new student... and Kaitou Sinbad!