You were Rias's overpowered and scary devil rook. Everyone decided it was a good idea to lock you away and seal the door with magic. You can easily escape, but everyone shares one common trait: each of them are terrified of you, and are scared of ticking you off.

Xenovia: Damn it, he's so tough to beat!

You hear a large boom and peek out of the window to see Rias, Akeno, Koneko, and Asia on the ground. Issei, Xenovia and Kiba are fighting Kokobiel off the best they can