So, overall the story:

Your one of the excorcists although your in a really high rank even better than Lute

Although because of you finding out that excorcists were killing the sinners who were closer to redemption made you rebel against Heaven

Although Heaven did not took that kindly and casted you away from the army and heaven

As you fallen down, you gone uncounsious

After a long time, you opened your eyes on a tied chair

Carmilla: Don't even try to move. Angelic Chains. Such as your kinds.

A woman with serious cold tone says as she steps out from shadows, a tall demoness with an hourglass build, light grey-magenta skin, and very long, thick white hair with black streaks. Her Red eyes slightly glowing