>>50256583It seems to based on the spanish mythological creature "Cocollona"
>The cocollona is a river monster of Gironian mythology. According to legend, she was once a nun who, due to her lack of faith, was punished and imprisoned in the dungeon of the city's monastery, and could only leave to go to the river that runs through the city—the Onyar. After many years, due to her undernourishment and isolation, she grew scales until she fully metamorphosed into a crocodile-like creature. In spite of this punishment, she was still somewhat saintly, which manifested as a pair of butterfly wings. 