An elderly man, Rao seeks to free the people of Sand Land from the king's pocket.

Spoiler

Formerly known as General Shiba, Rao disappeared after his forces died years earlier trying to destroy a weapon on the king's orders. As he travels with Beelzebub and Thief, he learns that the weapon was actually meant to produce water. Regretting what he was tricked into doing, Rao sets out bring down the king and help those whose family died due to his actions.