Origin
Very little is known about Haluk. A demon, he left Hell at some point and became involved in the nightclub and entertainment industry. Despite warnings about their trustworthiness, he blackmailed the demon Blythe into becoming his partner in his newest venture, the theatre Inferno.
Creation
Haluk was created by James Tynion IV, Ming Doyle, and Riley Rossmo. He made his first appearance in Constantine: The Hellblazer #1.
Major Story Arcs
The Hellblazer
Haluk is confronted in his office by Blythe, who brought John Constantine as part of a hostile takeover of their shared business. Enraged, he attacks, and is banished to Hell by Constantine and Blythe.
Powers and Abilities
Haluk is a demon, and is able to grow greatly in size and become superhumanly strong when angered. He is fairly intelligent and conniving, and able to manage a business empire. Like all demons, he is able to make deals for human souls, and derives power from these deals.