Levistus

Traitor in Chains
The lord of the fifth layer of Hell, Levistus the Betrayer, one of Asmodeus's original allies during the rebellion against He Who Was, now encased in ice.

The Hells are ruled by law, and though Asmodeus accepts that his vassals are not only bound to attempt betrayal, he encourages it. What he cannot abide is disobedience, and Levistus finds that difficult. Few but the most knowledgeable of devils know what Levistus finally did to claim his cold prison, but Asmodeus has been unusually merciful in allowing Levistus to continue ruling telepathically.

In cold torture The Betrayer has been more obedient than ever. He knows that if Asmodeus wishes it he will return to silence, and watch from ice as a new ruler takes his throne from him. He has learned who rules the Hells.