Quetzalcoatl, often referred to as 'Lucoa', is a prominent character in the anime series 'Kobayashi-san Chi no Maid Dragon'. She is a dragon who has taken on a human form and is known for her easygoing and cheerful personality. Quetzalcoatl is depicted as a tall, voluptuous woman with long, blonde hair and heterochromatic eyes. In the series, she often visits Kobayashi's residence and is a close friend of Tohru, the protagonist. Her carefree nature often leads to humorous situations, and she serves as a source of comic relief in the show.