Tangoo is the former Goblin Court Sorcerer whose apprentice was Tasha. He was greatly trusted in by not just the Goblin Kingdom, but he was banished when his dark intentions were discovered. Helped the Dark Sorceress and the Spider Witch escape from the Otherworlds.
Tangoo created the Firemental stallion, Starfire, who later bonded with Kara and became her paladin. However, it was revealed he only created the stallion so it would bond with Kara and help her find the Power Crystal that Tangoo wanted for himself. He then tried to steal it from Kara, resulting in the destruction of the precious crystal. He was then himself exiled to the Otherworlds.