Board Thread:Questions and Answers/@comment-31725345-20171222073144/@comment-31552453-20171225222653

Quetzalcoatl is a somewhat special, as the Aztec Gods were famous for using mortal vessels. Due to this, an aspect of her has been summoned in the form of an unknown woman. Or something weird like that.

On Chiron, it would probably depend on how powerful the Greater Grail actually is. If it could actually fulfill any wish, then it should be possible, in some form at least. The interesting question then would be if there would still be a version of Chiron that is a Heroic Spirits and another that is a Divine Spirit. Or maybe the Grail would not have that power at all, as we haven't really seen the full extent of its abilities.