He is shown to have the ability to freeze and unfreeze time in specific situations. Pazuzu (voiced by Patton Oswalt) – The family's helpful goblin dog that pretends to be a regular dog while on Earth.She and Balthazor have a passionate and sexually charged marriage. Tina is bitter about her abrupt transition from a hardworking employee to an average housewife. She is an alcoholic and has an obsession with gossip as she is constantly seen with an alcoholic beverage in one hand and a gossip magazine in the other. She has a short temper, is a bad driver, stubborn streak and is very protective over her family. Tina Hellman (voiced by Molly Shannon) – Balthazor's physically attractive and strong-willed wife and mother of Josh and Mandy.He has the power to breathe fire out of all his cavities such as his mouth, nostrils and once farted fire. Despite being a demon, he is overall a nice guy where he cares for his friends, such as when he covered for his friend Chevdet after getting him drunk despite it preventing him from destroying the drill, and deeply loves his family, usually ending each episode having a group hug with his family as well as state "I love you all". He appears self-conscious about being overweight as he gets offended when others make fun of it.
Balthazor is shown to have an evil side too, as he almost drowned Tina's father Zebulon when he insulted his father and tried to get him fired. He is constantly trying to either get promoted or demoted at work in order to get closer to the drill, the target of which he was sent to destroy. He almost faced punishment from Satan because of that. He has a vast knowledge of human behavior from watching much human television in Hell. He is a bit naive but is a very kind-hearted demon.
They also realize that the humans can be as bad as the demons, and that Earth is almost no different from hell.
The Hellmans face a culture shock trying to fit in with humans. A family of demons from Hell called the Hellmans are sent by Satan to Texas on a mission to destroy a drill that can dig to the Earth's core where Satan fears that the humans will invade Hell if the drill reaches it.