The Fallen Knight Lurking Beside the Saintess

[Western fantasy + power struggles + fast-paced + multiple races + System + multiple heroines]

The righteous Saintess of the Holy Empire protects her homeland, fights demons, and upholds justice.

Then one day, the Saintess who swore to protect everything turns her sword around and utterly destroys the empire and the church in blood and fire.

Noble: “How is this Saintess even more ruthless than a demon?!”

Emperor: “Who on earth told her to do this?”

Pope: “I have no idea!”

Demon King: “She's done my job for me. What am I supposed to do now?”

God: “Come on! Fight! All of you, fight! I want to see rivers of blood!”

(The story gets dark at times. Don't read if that's not your thing.)