Tiamat, the Archdevil of the lair of Avernus, is the lawful evil dragon goddess of greed, queen of evil dragons and, for a time, a reluctant servant of Asmodeus. Tiamat is also the eternal rival of her brother Bahamut, ruler of the good metallic dragons.
Description
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 had the powers of a member of the respective race of dragonkind. Her body also has the traits in common with a wyvern, including a long tail tipped with a venomous stinger.
Personality and Power
Tiamat was arrogant, greedy, hateful, spiteful and vain. She never forgave any kind of slight and was focused on obtaining more power and wealth. She disdained mortals, regarding them as mere disposable tools in her schemes. When needed, she was charming and fey, but her self-serving and reptilian personality betrayed her sooner or later.
After having experienced relative mortality as an archfiend, she became less reckless but also paranoid. Tiamat enjoyed the company of dragons, and had many great wyrm consorts of the chromatic varieties. She had an insatiable greed for treasures, but preferred that her followers brought it to her in the form of gifts instead of searching for riches on her own.
Relationships
Tiamat was the antithesis of her brother Bahamut, as both of them represented opposing values, and this enmity was reflected in the attitude of each deity's worshipers as well. She was also at odds with her daughter Ereshkigal for some slight lost to history. The god of the kobolds, Kurtalmak, was also her servant.
Having once been an archfiend living on Avernus, Tiamat was loosely allied with Bel and lent him many Abishai to fight in the Blood War. She resented Mammon for converting some evil dragons away from her. She helped Asmodeus forge his Ruby Rod. She developed an enmity with Asmodeus and the archdevil Bel after they betrayed her.