The world of Black Butler / Kuroshitsuji

Clue

Angela looked to the nun, who I recognized to be the one that had sex with Sebastian, who was now glowing.

"That women smells like a demon..." Angela whispered.

Suddenly, Sebastian appeared beside her. "Yes. You see, she has been marked already." Undertaker must have used his death bookmark on the nun's cinematic record to transport Sebastian from the Cinematic Record Library to this abbey.

Angela narrowed her eyes, "What a pious demon you are, to wish to die at an angel's hands... Sebastian Michaelis."

Sebastian abruptly jumped towards Angela, and she dodged by flying upward. I backed away to the back of the dais to avoid getting caught in this supernatural fight. Sebastian landed where Angela was, turned around, and threw some knifes at her. She dodged with ease and landed.

"Do you think a demon can compete with an immaculate-winged angel? Wingless demons are chined to the earth... for eternity."

"Oh, is that so?" Sebastian stood up straight, "In that case, may you be chained to the heavens."

Angela's eye widened as Will and Grell appeared behind her. Will's death scythe caught Angela's throat, extended, and pinned her right into the the wall at the back of the dais.

"Grell Sutcliff!" Will threw an exact copy of his death scythe to Grell.

"Yay! A brand new death scythe!" Grell excitedly extended that death scythe, which stabbed right through Angela's hand and wing into the wall behind. I felt a drop of the angel's blood fall onto my face as I was right below her.

"This is an entertaining little diversion." Sebastian joined the two shinigami, "Let's treat ourselves to a game of darts, shall we?"

"Arg!" Angela cried out as Sebastian threw two knifes into her arm and stomach.

"Hmm, I missed." Sebastian smirked, "Now, where should I hot her next?"

Suddenly a terrifying sound began to come out of Angela's mouth and she started glowing. The whole building of the abbey was beginning to shake and debris were falling off. It was about to collapse. All the followers of the cult started to run out of the building, and Sebastian, Will, and Grell were retreating as well.

With a pang of shock, I realized that I wouldn't  be able to get out of here in time as I was at the further part of the building away from the door. I locked eyes with Sebastian as he was backing away and I gave him a pleading look. He merely narrowed his eyes and turned away, leaving the building in an inhuman speed. I froze as I realized that Sebastian had just practically left me to die.

The column next to me collapsed and I shut my eyes fearing for the worst. I could hear the world collapsing around me, only that I felt nothing falling on me. I waited until the chaos stopped and opened my eyes.

The first thing I saw was some white feather. I looked up to see that Angela had been shielding me with her body and wings. She extended her wings and the debris on top of us fell off.

"A...Are you alright?" She asked weakly.

"More like are you alright!? Oh my gosh, you are bleeding everywhere!" I exclaimed as I stood up.

"It's no a problem, my pure one. It will heal quickly." She looked like she was very tired.

True to her words, I could see all her wounds becoming smaller and closing. She rested there with her eyes closed for a few minutes and her wounds seemed to be almost gone by the end. She still looked terrible with blood-soaked wings and clothes.

She stood up, evidently now with much more strength. "Let's go, my pure one."

"Are you sure you're alright?" I asked.