Tanetal

Tanetal is a Pit fiend and servant of Bane who plays a large role in the Novel Pools of Darkness

Servant of the wizard
Tanetal was brought into the service of Marcus by Bane in order to aid the mad wizard with his role in bringing more power to the dark god by sacrificing human souls to the Pool of Darkness. Vastly more competent than his nominal master, Tanetal is used as a scapegoat by Marcus. Even though he has brought power to the wizard and parlayed thousands of troops into his service, Tanetal is stymied by the inept wizard.

Human form
Near the end of the book, Tanetal assumes the form of the human bard Latenat in an effort to convince the people of Phlan to abandon the stolen city and leave the safety they enjoyed there. His plot almost succeeded until the Red Wizard Marcus summoned him to his defense at a most inopportune moment.

Demise
At the conclusion of the novel, Evaine manages to banish him to the Nine Hells by figuring out his true name.

Trivia
Tanetal showed a habit of saying Latenat at the beginning or end of his speech.