Dororon Enma-kun

From Manga Updates Manga version of the same-name anime. Enma-kun (a flame-based boy) along with Chapeauji (a demon with the form of a hat), Yukiko-hime (an ice-based girl) and Kapaeru (a Kappa) form the demon-hunting squad sent by Enma-Daio, the ruler of Hell, in order to capture escaped demons. With the help of the human boy Tsutomu, the Yokai Patrol fights the demons they encounter to stop them from causing mischief.