Asmodeus

is a Demon who is a former ruler of one of the Demon World's countries prior to its unification, thereby being a member of the Seven Deadly Sins. Asmodeus is currently residing in the Human World as a captive of the Solomon Company.

History
Before Beelzebub III united the Demon World under his rule, Asmodeus was the ruler of one of its countries.

Asmodeus eventually fell into the hands of the Solomon Company sometime after.

Powers and Abilities
Immense Demonic Power: As a member of the Seven Deadly Sins and thus a ruler of the Demon World before its unification, Asmodeus is an extremely powerful demon.

Trivia

 * In Christian mythology, Asmodeus is one of the seven princes of Hell, representing the sin of lust.