Quetzalcoatl

Often portrayed as a winged, feathered serpent, Quetzalcoatl is a god of Wind, Wisdom, and the subsequent change associated with both. Despite being serpentine in form, he is not really the god of Serpents, that duty instead falling to Asclepius and Zehir.
Quetzalcoatl either takes the form of a gigantic Couatl or as half-breed Yuan-Ti. When interacting with mortals, his attitude has been known to be jovial, but unsurprisingly volatile given his divine association with wind. Those who have had favorable interactions with him note that he is gut-wrenchingly funny and fast-witted. Those who have had sour interactions with him walk away with impressions of a jaded and fatalistic old man driven by bitterness.
Rumor has it that some worshippers of Quetzalcoatl built a flying temple ship that stays within dangerous orbit of The Unmoving Tempest.