Georgius

Georgius is the top Saint of Index.
In 1945, Georgius and his Punishmenr Squad was sent by Index to Ayamegaoka to eliminate Index's top priority threat, Lieselotte Werckmeister. Her overwhelming power forced him to use the forbidden spell Contract of the Rainbow, which successfully sealed Lieselotte away, but at the cost of Georgius' life.
Georgius was resurrected as Avaritia by Misao, but with his memories intact.