Lucoa the Quetzalcoatl

"Shouta-kun~!Let's go strolling~!"

Lucoa the Quetzalcoatl from Kobayashi-san Chi no Maid Dragon/Ms. Kobayashi's Dragon Maid

Wikia Time:

She is a former dragon goddess and an old friend of Tohru. She was exiled from her seat of goddess after consuming a cursed liquor, that led her to entering into a scandalous affair with her sister.

Now she lives with Shouta Magatsuchi 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.