Hello there, Skylinemaster here with another installment of the world works in mysterious ways.

"Speech."

Disclaimer: I don't own anything from Highschool DxD or Supernatural.

"Ah, who are you?!"

Irina Shidou shouted as she reached for her sword.

She is yelling this to the man in the trenchcoat, staring at her and Xenovia as they slept.

"Are we under attack?"

Xenovia said, getting her sword, the Excalibur Destruction, and pointing it at the man, who is still staring at them blankly.

"Please do not be alarmed. I was sent to help you in your mission."

"Identify yourself."

Xenovia said, still pointing the sword at the figure.

"My name is Castiel, and I am an Angel of the Lord."

They didn't believe it.

He said he was an Angel, and he proved it by displaying his wings to them.

Xenovia and Irina were in shock at having seen an actual Angel.

For the duration of their lives, they've seen everything.

Or so they thought.

They've seen Wraiths, Ghosts, Demons, Vampires, and anything else supernatural.

But they've never seen an Angel.

And now they were very confident that they were going to find the Excaliburs.

The two went into the meeting with the Occult Research Club with Castiel, instilling fear and concern into the Devils.

Rias knew of the power of the Angels, of their abilities to completely destroy all but the most powerful of Hell's inhabitants.

Demons and Devils were no match for Angels, and Rias knew of this mainly from her brother, who has faced off with many Angels, barely surviving the encounters with them.

If her brother, one of the strongest Devils, and one of the two Super Devils in existence couldn't handle middle class Angels, how could she?

These thoughts were in Rias' mind as she looked at the two exorcists and Castiel.

Castiel's gaze however, was not on Rias, but on Akeno.

Castiel focused intently on her, feeling the aura her body is extruding.

Akeno was sending back daggers at Castiel, her hatred of her father is projected onto Castiel, not a Fallen Angel, but an Angel nonetheless.

Castiel was standing silently as Irina spoke to Rias, but felt the need to say something due to Akeno's glare.

"Is there something of the matter, Nephilim Devil?"

Rias gasped as Akeno shook with fury.

Everyone readied their weapons as Castiel gazed at Akeno.

"W-what did you call me?"

Akeno asked, her voice teeming with rage.

"Nephilim Devil. Your father was Baraqiel, a Fallen Angel, and your mother was a Human. You were therefore a Nephilim before becoming a Devil, henceforth Nephilim Devil."

Akeno launched a lightning blast at Castiel, who dodged the attack after teleporting Irina and Xenovia out of the room.

Xenovia and Irina were in shock and looked at Castiel, who had a worried expression on his face.

"Hmm, I believe that we were just attacked."

Xenovia and Irina faceplanted at this.

They looked up in terror at him.

Xenovia and Irina looked up at Kokabiel, who is grinning maniacally.

They attacked his base without Castiel.

Xenovia said she could do it, and Irina agreed.

Castiel nodded and went back to Heaven to report the attack on him by Akeno.

And so they prayed that he would come back and help them finish Kokabiel.

A flutter of wings was heard, and Kokabiel turned to see Castiel with an Angel Blade.

They were saved!

"Castiel, how nice of you to show up."

Kokabiel said sarcastically as he flexed his ten black wings at Castiel, who remained unimpressed.

"You think that little blade can kill me?"

Kokabiel joked as he stared down at Castiel, who let his own wings be shown.

"Have you forgotten that being out of Heaven removes much of your power, Fallen?"

Kokabiel frowned at this, and charged at Castiel.

Kokabiel generated two Light swords, and swung them at Castiel.

Castiel blocked one of the Light swords with his Angel blade, and sidestepped to avoid the other one.

Castiel punched Kokabiel in the face, staggering the Fallen Angel, before thrusting the Angel blade into the Fallen.

Instead of white coming out of Kokabiel, pure darkness radiated from Kokabiel as he died.

Castiel examined the shadow of Kokabiel on the ground, ten wings imprinted on the surface of Japan.

Kokabiel has died.

I hope you enjoyed this. Please follow, favorite, and review. If you have an idea for a one-shot, please message me or review, and I may write about your idea.

Tentatively planned stories.

-Dean and Sam in the Kuoh Academy peace treaty meeting

-DxD Michael meeting Supernatural Michael

-Balthazar meets DxD Azazel

-Lucifer attends the Kuoh Academy meeting

Until next time, Skylinemaster out.