Rider-class Servant in Fate/Grand Order first appearing in the Babylonia singularity. A god from Aztec mythology who loves humans and grants them his blessings.
Quetzalcoatl is depicted as female (due to the Aztec gods in Fate universe actually being alien parasites who take on human hosts), and she loathes her fellow god Tezcatlipoca due to their differing beliefs on human sacrifice. Loves luchador and inserts gratuitous English in her sentences (localized to Spanish in the English translation).
