Buer, the 42nd Demon of the Ars Goetia

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As Elena battled Arthur, the sword he wielded revealed itself to be the actual culprit behind everything, a powerful Demon, taking conscience and even floating in midair, defending Arthur from being completely slain by her.

"So you're truly a demon! Stop protecting him!"

Elena hastily rushed towards the sword, as the demonic blade quickly floated in midair, exuding its demonic, dark aura, and creating a series of blade-shaped projectiles. It wasn't going to let her approach him so easily.

"I have to thank you; you've made him quite ripe for the taking."

The Demonic Sword, however, seemed joyous of what she has done!

Why would it be happy she almost killed Arthur anyways?

"What…?!"