Tezcatlipoca

Tezcatlipoca is a Magic God of Aztec Mythology and a member of the true Gremlin, first mentioned in Shinyaku Toaru Majutsu no Index Volume 13.

Magic God Invasion Arc
At some point around the time of the incident instigated by the High Priest, Tezcatlipoca encountered Kamisato Kakeru and was 'exiled' by his World Rejector.