Mille is known as the Yìshù shén which is Art God. They have been alive for centuries waiting for any of their friends to reincarnate. They get to make new friends and family and so much more along the way.
"A blade has two sides; one to protect, one to kill."
In the midst of the Holy War between exorcists and the Noah, there is one who stands on top. Not the victor of the war, but a single sinned angel whose existence was erased from history.
"The kindest soul can be turned into the strongest weapon."