Lucoa

Lucoa (full name Quetzalcoatl) is a main character in the Miss Kobayashi's Dragon Maid series. She is currently living with Shouta in his home.

She is the Aztec dragon goddess of fertility and culture and another friend of Tohru, who lost her divine status centuries ago after getting drunk and causing a scandal involving her younger sister, much like the Quetzalcoatl of the original mythology. She is often referred to as Lucoa (from "lcoa" of the deity's name presumably because it is easier to say) and Tohru sees her as a source of wisdom but will sometimes casually reference the events in her past, much to Lucoa's embarrassment. She lives with Shouta after he unintentionally summoned her and appears in her human form as a tall woman with gigantic breasts, multicoloured hair, and striking heterochromia.