Monster Soul

Monster Soul (モンスターソウル, Monsutā Souru) is a manga series written and illustrated by MASHIMA Hiro.

Plot
The tale of Monster Soul takes place in Elfenland, which is inhabited by both humans and monsters. The main characters are a group of monsters called the Black Airs. The Black Airs is recorded as the strongest group of the monster forces in the great war between the humans and monsters.