Makai Senki Disgaea

Synopsis

Laharl, Flonne, and Etna meet with Captain Gordon, Jennifer, and Thursday at a saloon, where it is discovered that Laharl has a little demon sister named Maharl, though Laharl denies this fact. A group of biker empresses are actually after Maharl, but nobody knows the reason why, leading Laharl to become suspicious of her. He plays the role of an older brother, with Flonne and Etna being dragged along. It seems that Maharl is well association with King Krichevskoy, much to the surprise of everyone. The biker empresses capture Maharl, and Flonne is also caught while trying to find her. Even though Laharl and Etna has come to the rescue, it is realized that Maharl is really a doll.

(Source: Wikipedia)