Quetzalcoatl

Quetzalcoatl (ケツァルコアトル Ketsarukoatoru), often referred to as Lucoa (ルコア Rukoa) is a former dragon goddess and an old friend of Tohru. She was exiled from her throne after getting drunk and sleeping with her sister, creating a scandal.

Appearance
When in her human form, Quetzalcoatl becomes a tall, fair skinned, and voluptuous woman with enormous breasts. Her hair is long and blonde, taking on a turquoise color at the ends. She has heterochromia, giving her two different eye colors and designs. Her left eye is black on the outside and yellow on the inside, with a green, slit pupil. Her right eye is green on the outside with designs and black on the inside with a yellow, slit pupil. Like Tohru, she keeps her horns but unlike Tohru, she does not retain her tail or decides to keep it hidden. When she first arrives at Kobayashi's home, she dons a pink cap, a choker and necklace (only in the manga), a black tanktop that exposes her stomach (covers her stomach in the anime), jean shorts, thigh high black stockings, and pink shoes.

So far, her true dragon form has not been explicitly shown, apart from a sneak peek on the Opening Credits.

Relationships

 * Magatsuchi Shouta - Quetzalcoatl lives with Shouta but does not work for her stay. The two of them have a complicated relationship as Shouta sees Quetzalcoatl as a demon rather than a dragon. Quetzalcoatl will often try to get Shouta's attention, often ending up embarrassing him instead.
 * Tohru - An old friend of hers, Quetzalcoatl has faith in Tohru as she asks her and Kobayashi for help in convincing Shouta that she isn't a demon. She also cares for Tohru and will occasionally visit Kobayashi's place to check up on her.
 * Kobayashi - Quetzalcoatl and Kobayashi have a good relationship. They'll often talk to each other while Tohru is away and Kobayashi trusts Quetzalcoatl enough to tell her how she truly feels about Tohru.