Pretender-class Servant. Her Saint Graph bears the names Tlaloc given the Ruler class in the South American Lostbelt, and Huitzilopochtli, given the Berserker class in the South American Lostbelt.
Spoilers below for Lostbelt no. 7: Golden Sea of Trees Travelogue: Nahui Mictlan. Her true identity is the Aztec capital of Tenochtitlan itself summoned as a Servant.
