Fia Kruez

Originally only known as "Father" to Teito, he took Teito into a church and raised him. When Teito was a child, he taught him many things, including the majority of the church's writings. Fia Kruez was excommunicated from the Church shortly after Teito left, for escaping with Pandora's Box.

He cared for Teito very much, having raised him and being his primary father figure. He is actually the King's younger brother, making him Teito's blood uncle. Although there are many differences between him and Frau, Teito is still reminded of Kruez a lot when Frau is being serious. It is later revealed in chapter 39 that he was the one who sealed Teito's memories in order to protect the Eye of Mikhail and hide the location of where he hid the Pandora's Box.

Fia Kruez is also another of the 07-Ghosts, Vertrag. He was devoured by Veloren, causing him to gain his powers.