Shura

Shula (シュラ) is an anime-only character who is a human-like demon with long black hair, pointy ears, and a "w"-like symbol on his forehead. As such, he lives in the Demon World, and he owns the title of king, as well as one of its best fighters.

Biography
Shula is a powerful demon who single-handedly managed to open the giant entrance to the demon world, and kept it open for a while by wedging his cursed sword in its door. During this period, he and many of his minions continually tormented a nearby kingdom during nightfall. He eventually took an interest in the kingdom's young Princess Misa, and kidnapped her, so that he could marry her. It was not long afterward that Misa's father, King Kress, sent the young Goku after him to retrieve Misa.

When Goku finds Shula in the demon world, he finds that Shula has thrown a party to celebrate his soon-to-be bride. Goku confronts Shula, and challenges him to a fight, to which Shula accepts. Shula proves to be a quick and powerful fighter, but Goku manages to find his weakness. The demon world is a place where no bright light has ever entered, and Shula's eyes had become accustomed to it. Goku fires a Kamehameha and blinds Shula, then smashes the demon against the wall. When Shula gets back up, he finds that Goku and Misa are escaping and he sends his minions after him, but two demons, Melee and Gola, block their path. Goku manages to get outside and close off the entrance to demon world forever. Melee then tells him that this is how it should be. Rather than punish her and Gola for interfering, Shula decides to carry on with his party, and invites the two demons along. Shula has never escaped ever since, but it is likely that he is still alive.

(Source: Dragon Ball Wikia)