
Tiamat is the lawful evil dragon goddess of greed and the queen of evil dragons. For a time, she was a reluctant servant of the greater gods Bane and later Asmodeus. Before entering the Faerûnian pantheon, she was a member of the Draconic pantheon, and for some time she was also a member of the Untheric pantheon.
Tiamat is also the eternal rival of her brother Bahamut, ruler of the good metallic dragons.
Tiamat is a unique chromatic dragon who has one head for each primary color of the most common species of chromatics (black, blue, green, red, white). Each head is able to operate entirely independently of each other and has the powers of a member of the respective race of dragonkind. Her body also has traits in common with a wyvern, including a long tail tipped with a poisonous stinger.
Tiamat is the one thing that Venger fears. Why this is so, however, has not yet been revealed.
LOTM: The Angels Return[]
Tiamat was dominant of the Valley of Dragons and proved to be a terrible opponent to Team Disney Angel. Anything they threw at her, she could throw off and was not even phased. To make matters worse, all the evil in her heart attracted a swarm of Heartless!
Luckily, Ladybug's good luck power was able to conjure up a magic scroll to summon Bahamut, who came with his seven clerics. Once the Heartless were out of the way, Bahamut and his seven clerics united their powers with SuperOphanimon, SuperNeoMyotismon and GalaxyMervamon to seal Tiamat away. But we're convinced this is not the last we'll see of her...