AN: I don't own anything but the plot, Snape's Demon and my OC. Everything else (Blue Exorcist and Harry Potter) belong to their respected owners. Rated Mature, just in case.

Enjoy and Review!

3rd PoV

5th year Potion's Class with Snape, everyone's least favorite class, except for Malfoy. He always seemed to be the favorite of Severus Snape. But everyone knows that it is because Draco is a Malfoy AND a Slytherin.

Harry Potter, Hermione Granger and Ron Weasley always sit together. The Golden Trio, or as Snape likes to call them, The Trouble Trio. For wherever they are, trouble is sure to follow.

Snape walked around the room, robes bellowing, as he watched (more like glared) at everyone's potions, just daring them to make a mistake and blow up. Everyone is nervous under his intense stare, everyone 'cept Hermione, who think that the reason their professor acts like this is because of the fact that potion making was dangerous. Of course, she was the only one to think that.

Today, they were making a very complicated potion called Wolfsbane. It is a potion that, if they were a Werewolf, to be able to have control over his transformed form during a full moon.

Everything was quiet except for the bubbling of potions.

All of a sudden, Neville Longbottom's potion blew up. Snape turned towards his incompetent student, his eyes flashing in anger. To be honest, everyone was surprised that Neville lasted that long without blowing up everything.

But as the Golden Trio looked at their professor, they shivered at the dark aura he seemed to be emitting. That wasn't all. His eyes also seemed to change color; blue with red pupils. Before the Trio could dwell any longer on his eyes, Snape closed them and took a breathe. When he opened his eyes, they were back to their original onyx color.

The Trio looked at each other in confusion.

Hermione mouthed Later.

Harry and Ron nodded before going back to their potions. The color of the potion should be a transparent aqua blue color. Hermione, of course, got the correct shade of blue. Harry got a darker, almost purple shade. While Ron, somehow, got a neon pink color.

Then, the bell rang, releasing them from classes for the rest of the day. They put all their potions into a small canister with their name of it, placing them on Snape's desk to grade.

As they exited the class, the Trio started talking.

"Ron, how in Merlin's name did you get your potion to be neon pink?" Asked Hermione.

Ron blushed. "I don't know, 'Mione. I really don't want to talk about potions outside of Snape's classroom."

Harry nodded. "Agreed. Hey, did you guys see Snape's eyes? They were like, blue with red slitted pupils. I don't think that's normal."

"Yeah. I noticed it too. Do you think that his eyes represent his mood, like certain shapeshifters?" Asked Ron.

"Good Theory, Ron, but I don't think that that's the case. We would have noticed it by now." Hermione stated as they walked across the courtyard where multiple students lingered. They even saw Snape walking a fast pace across it, like he was trying to get away from something fast.

Suddenly, an explosion rang out from the middle of the courtyard. When the dust cleared, it showed a man. He had pinkish purple hair, purple horns sticking out, violet eyes with red pupils (anyone getting the picture so far?), sharp canines, long and pointed ears, a black cat tail with a blacked tufted end swishing behind him and sharp features. He wore a black and purple tuxedo with black dress pants. He looked like a business man or even worse - a politician.

The new man stood up, unscathed, and scanned the crowd that was beginning to form. His eyes stopped on Snape who was trying to blend into the crowd while edging himself away. The man smirked.

"Come out, Sevvy, I know you're there~" Sang the man. The students were confused. Who was Sevvy. Snape looked horrified and he gulped, before changing his expression to indifference.

Finally, Albus and Minerva (Dumbledore and McGonagall) arrived at the scene.

"Everyone get back." Ordered McGonagall, leaving no room for protests. Dumbledore slowly approached the new man.

"Why have you come here?" Albus asked nicely, no use being rude.

The Man's eyes moved to Albus, his whole posture casual.

"I'm here for Severus, one of your dear professors~" The Man proclaimed without any hesitation.

The students rushed into the corridors that surrounded the courtyard, scared silly but still they wanted to know what was happening. Why was this guys after their professor?

His eyes went back to Severus, gleaming with insanity and power.

"There you are~" He sang as he shot a purple huge powerful magical blast from his palm easily.

It hit Severus dead on, blasting his into on of the walls of the corridors. Everyone stared at the Man in shock, that power of magic (both wandless and wordless) was unheard of.

No one noticed when Severus got up and slowly started walking towards the Man.

"No you have done it, Lucifer." Proclaimed Severus. Snape lifted his right arm. He pulled something from the void, where the most powerful creatures can store their items. All of a sudden, a large scythe appeared. It was a scythe that had a long handle, about 5 feet, with a blade that was black with a blue tinge and longer than the handle. It seemed really heavy, yet Severus wielded it professionally like it weighed nothing.

The Man's, now known as Lucifer, smirk grew even bigger as Severus angled the scythe so that the blade was behind his back.

Severus's appearance began to change. His ears became longer and pointed, his nose shrunk, his canines grew to an almost feral level, his outfit changed to a black and blue tuxedo with black dress pants, he had a tail that was exactly like Lucifer's and his eyes were blue with red pupils. He also seemed to have blue flames in the shape of horns on his head. It was so quiet you could hear a pin drop.

Lucifer started laughing hysterically before he started speaking.

"Finally Brother! Father wants us in Gehenna for his final plan of total control over Assiah. Come on."

No. Nononononoononono! I am not going back to that Demon Realm, despite the fact that I AM the son of Satan, the Devil himself. I left and hide so that I would be away from that.

Severus thought. He hated Gehenna, all of its madness and impurities. With everything that was going on in Snape's life, he hoped that he could finally find peace. Guess all wishes can't come true.

"I am never going back." Severus's voice boomed, different from his normal professor voice. It was sharp, and almost had a childish tone to it.

"I guess that I have to take you back by force.~" Lucifer said in a singsong voice as he summoned his lance from thin air. It was a 6 foot long staff with a very sharp point at the end. It was black with a purple tinge.

"You can try." Severus snarled as he started to smirk, canines showing. They seemed to have forgotten that they had an audience. No one moved.

Severus then crouched, Lucifer following in sync, weapons at the ready, tails swishing in anticipation.

Quicker than a blink of an eye, the 2 launched themselves at each other. Meeting in the middle of the court yard, causing the wind to send a powerful burst of energy outward.

The 2 looked at each others eyes, only seeing a bit of madness and insanity that would reside in a Demon. They both smirked as they jumped a bit away from each other before shooting up into the sky, where they battle continued.

TBC

AN: I hoped you enjoyed the first part of this story. I will try to continue it. Plz leave a review and I hope that y'all enjoyed this!

See ya later!

-Jitsu Out