Quetzalcoatl  

Feathered Serpent, Great Firebird of the Sun, Kuku, ケツァル・コアトル

The Goddess of Venus and the Great Bird of the Sun. Rider-class Servant based at south from Uruk. One of the Three Goddess Alliance. Although she has a hot and bright personality like the Sun, she also shows a ferocious and brutal side that likes to go straight in the battle.