DEM's Building:

Dead demons piling across the hallway and by the door, their guts and brains are smothering everywhere around the area like some decorations from a horror house. However still, swarms after swarms of demons are still flocking their way inside the office where Shido and the spirits are trying to hold their ground. The demons are not even thinking twice before charging in the meat grinder.
On the frontline are Shido, Tohka, Kotori, Mukuro, Kaguya, and Yuzuru, they are barely holding off the demons using their weapons while at the backline are Kurumi with her clones, Origami, and Yoshino are blasting the demons with their bullets and destructive beams of light and ice. The other three of the backline are Miku, Nia, and Natsumi. They act as a support and a supply like battery for the powers of their friends so their spirit powers can last much longer in this deadly survival situation.
They know if one of them fall, all of them are a goner.
"Stand your ground!" Tohka hack and slash each demons with ease like a hot knife slicing through a butter.
"They are endless, we cannot fight forever!" Shido yells out as he uses the same sword as Tohka, but he wields it less better than the original wielder.
Kotori grabbed one demon by the neck and burn it, slowly turning it into dust.
"I cannot call Elliot because they are being attacked too... Dammit! Might as well try it. If it's useless, I need to find another way for us to get out of this mess!"

When she's about to press the button of her earphone, she felt something sharp slice the skin of her right cheek as someone or something immediately stole the earphone off from her ear.
"What?!" She exclaimed. When she glanced behind her, a female demon or demoness is grinning at her and showing her razor sharp teeth that can rip through flesh.
Kotori heard the others screamed as they got taken as prisoners by the other demonesses. They tried to fight back, but their spirit powers are useless with these demons.
"Nice to see you again Ifrit."
The whole room got filled with demonic laughter. All of Kurumi's clones got dragged under the shadow and some of them got decapitated, painting the floor with their blood. With the real one, she barely evades every deadly attack from below her feet and above her head, unfortunately for her the succubuses still succeeded on capturing her. The succubuses hold her limbs treating her like some escaped animal, making sure she doesn't do anything funny. They put a stake on it to make sure Kurumi won't escape. A series of horrifying cracks and crunches filled the whole building, accompanied by a blood curdling scream of agony when the demons breaks Kurumi's legs and arms.
"Kurumi!!!"
Shido escaped the tight grasp of his captor and tries to lunged out at the demons torturing the dark spirit. Despite his efforts, his captor teleported in front of him. He swung his blade overhead, but the demoness ducks down and land a fatal blow on his stomach, making him fall to the ground. Thanks to his regeneration, he survived the single attack that a normal human being will instantly died in.
The spirits called for his name and also tries to fight back, but they get silent quickly except for Kotori. The demonesses wraps around a dark rope enhanced with demonic powers around the spirits that can disrupt spirit powers and their Angels.
"Now, I'm the one who is gonna take care of you sweet Ifrit." The leader of the succubus licks her lips and put one finger under Kotori's chin.
"Damn you nibelcoles!" Kotori growled and flinched aggressively while grasping her halberd tightly.
The demonic girl laughed at her. "Nibelcoles? Oh no dear Kotori, we are more than that."
Kotori went on with the attack using her giant halberd, slashing like a berserker that's on fire. With the demoness being so agile and a lot faster than her, she keeps dodging Kotori's attack while mocking her.
Kotori got stopped when a lesser demon jumped on her back and buried its sharp teeth on her shoulder, making her scream and stumble face first on the ground.
"Awww poor little Kotori couldn't protect her brother and her friend." Mocked the succubus. She steps closer to Kotori and put her foot with sharp nail on her head.
"Always playing the hero won't get you nowhere dear." The succubus laughed. "You all brought this into yourself, now face the consequences!"
The succubus looks at her sister who is holding Shido into a choke lock and giggled.
"Mmmm sister? Maybe you should go have fun with little Shido for now. We will handle the others."
"Don't do anything that you'll regret! I will rip off your head!" Kotori struggled and roared out. She tries to channel her flames, but the succubus quickly grabs her head and absorbed her spirit powers. The other succubus did the same with the other spirits, leaving them all powerless and naked.
"My, my what an aggressive remark!" The succubus chuckled.
Another succubus suddenly appeared from the shadow shaking and wearing a terrified face while breathing quickly.
"Sister, father is in deep trouble! We need the human right away!"
The leader of the succubus glanced at the one who is holding Shido by the neck with a choke hold.
"Sister go now!"
Despite the lesser succubus disappointment, she summoned a shadow underneath her and Shido. They slowly descended while a quelching like sound filled the room.
"I will kill you if you hurt him! Kotori cries out while wriggling under the weight of the demon and fighting her fading consciousness.
"No! Stop it!" Shido cries out. The shadow started to consumed him and the darkness around his lower body feels like a million of daggers are piercing him.
Even though they are weak, the spirits struggles under their captors and scream out to Shido even though they know how useless their actions are.
"Someone help me!!!" Shido screams. He keeps screaming and yelling for help until it turned into an echo.
"Shido!!!" Tohka cries out. She couldn't do anything but cry and stared at the place where Shido disappeared to.
The others are trying their best to keep their emotions at bay. They know how big of a danger they are once they lose themselves.
Inside The Ship:

"Keep firing at it! Make sure it will not get too close to the ship!" Elliot screamed as he and Karen unleashed hell at the gigantic beast charging in front of them.
Elliot pressed a red button on the commander's chair and the ship started to fire a barrage of large missiles which hit the beast's on the eyes, making it roared out. The beast disappeared again by ascending to the dark clouds which the radar of the ship lose track of it once more.
After the beast disappeared without a trace, the ship begins to sound its spirit alarm. Both Elliot and Karen look at the other screen that is listing and tracking all of the spirits in it in horror. All their emotions are dropping low in a critical level.
"This is not good. Something might've happened to Shido." Elliot stated.
Karen rapidly type on her keyboard, trying to locate where Shido and the others are. She successfully tracks down the spirit, unfortunately she fail to track down Shido, making Elliot bothered by this.
"We need to go to DEM's building and find Shido quickly! We cannot afford the spirits to go inverse!" Elliot ordered which Karen nodded response.
Elliot shook inside his coat from just the thought of eleven spirits inversing at the same time. The ship's engine roared loudly which sounds like a cry of an angry dragon. It's thrusters exhumed blue flames as it moves the ship hastefully towards the location of DEM's building.
DEM's Building:
In what feels like an hour, all of the sudden, a blinding light peeked through the window and the building got filled with the roar of a big engine. The buildings that are standing close to DEM's building collapsed under the sheer size of the battleship hovering outside of DEM. Kotori and the others got filled with hope as they noticed Elliot and Karen came to save them.
"We managed to escape the large beast lately. I can see you guys got yourself into a doozy too?" Elliot chuckled through the speakerphone of the ship. On his monitor, multiple targets are already locked on.
"Karen, open fire!"
The small turrets around the ship, let out a barrage of 7.62 mm bullets on the succubus and other lesser demons that are surrounding the spirits. The rope that are shackling the spirits vanished in after their captors got neutralized. The spirits all drop down on the floor and covered their ears as the deafening guns are turning the lesser demons into a pile of shredded meats and innards while the succubuses turned back into dark damaged papers.
Without any warning...
*BOOM!!!*

"WE GOT HIT!!!"
A massive fireball rained down and struck the left wing of the ship. But that's not all, the large creature that Elliot and Karen faced earlier appeared from the dark clouds and flying towards to the ship with no intention of stopping.
"Elliot the monster is going to ram the ship, get of there!!!" Kotori cries out.
The creature let out a ear piercing roar while it opened its mouth, showing its rows of teeth. It began charging its mouth with flaming saliva like substance as it keeps its pursue on the ship.
Inside the ship, Karen quickly pressed a button on her keyboard and a green protective barrier surrounds the ship in an instant.
"BRACE YOURSELF!!!" Elliot yelled.
The beast hit the barrier with its mouth opened. The building of DEM shook and all of the things that are inside it got hurled back from the powerful shockwave. Thanks to what left over of her strength, Tohka still manage to summon a protective shield around her friends after the shockwave hits. Unfortunately, the building is starting to crumble into dust.
The girls closed their eyes. This is it, the final string of their life will get cut. But...
All they hear was a loud alarm and static the sounds like from a television with no signal. All of them open their eyes slowly and all they saw was red flashing light and Elliot with Karen are looking at them with a look of relief on their faces.
"Daleto!"
A loud bang of a gun muffled the alarm for a short time. Kurumi's clones shot the real one, healing her broken bones on her body. The real Kurumi slowly got up of her feet with an annoyed groan.
"Karen give them some clean clothes, food, and water."
Karen run along the back of the ship upon Elliot's order. Elliot eyed the spirit one by one and asked.
"Where is Shido?"
"We... we don't know. He got taken by those female demons. But, I got a hint they gonna take where Westcott is." Kotori steps in and answered.
Elliot sighed in frustration. "Damn it, we cannot track down Westcott because the monster damaged our radar."
"There could be another plan?! We need to get Shido, Westcott is going to kill him!"
Kotori started to teared up, she couldn't bear the thought of losing his only brother.
"I know where they are!"
A voice suddenly echoed around the ship.
"Is that Artemisia?" Kotori and the spirits glanced around the ship, expecting Artemisia to appear out of nowhere.
The former Adeptus tries to reasoned with them. She suddenly appeared inside the ship from a dark portal. The spirits got defensive, even though they lack the power to fight.
"Please stay calm, I am no longer under Westcott's control." Artemisia explained.
Although, still a demon, she put an effort to prove to them that she is no longer an enemy. However, the spirits are taking an extra precautions and will not risk on giving away their trust so easily. They know this girl was a pawn of Westcott, and Westcott is a master of deceiving.
"If you are really siding with us, tell us where Westcott is located?!" Tohka demanded.
Artemisia sighed. "I don't have time to explain because of your friend, but I saw my former master escaped all the way to Tengu forest."
"He built a secret lab in there. If we don't hurry, Shido will be sacrifice and he will summon the spirit of origin to take her powers. If that happens, demon and spirit powers will combined and not even the sons of Sparda will be able to stop him."
The sliding door suddenly opened, the people inside the ship didn't even have time to process of what's happening when Karen suddenly charged with un
All of the people inside the ship stared at Artemisia with wide eyes. They look at each other and whispered.
"D-Did I heard you correctly?" Elliot stammered.
The Adeptus only nodded.
"Then... Then we need to act now! Girls please help me operate this ship to its full capacity!" Elliot ordered. The spirits all rushed to the available crew decks, despite that only Kotori has the knowledge to operate it.
"I will guide you all on how to operate the ship." Elliot stated.
"Elliot?"
"What is it Artemisia?"
"I heard the radar is broken? I will go outside and you can follow me. After I got transformed into a demon, I can sense all the demons around the area including the brothers and Westcott, it feels like we are all connected to one another."
Elliot was hesitant at first, he knows Artemisia is the only key on saving Shido.
"Alright, I will put my trust in you on this."
Artemisia smiled a little, finally getting a chance to redeem herself.
"You can count on me!"
Over Tengu Forest:

Westcott leathery wounded wings barely carried him this far from the city. Beneath him, are the gloomy forest of Tengu, great for taking cover, however the brothers are still on his track. He needs to figure out on how to lose them before he can go to his lab and begin the sacrifice.
He already lose his patient from his succubus on how slow they take actions on this serious situation. He already gave them the gift to overpower the spirits, but it feels like it was never enough.
"They are gaining on me!"

He summoned one spear on his hand. He twist his body so he can hurled the spear with an unimaginable accuracy. The brothers barely dodge it, though they may think they dodge the attack, the spear teared through the fabric of time and space. Westcott channeled his dark powers and summoned demonic hands from the wound of the atmosphere. The hands grabs the brothers, restricting their movements.
Westcott grinned and not wasting anymore time to escape, he knew those hands will be dealt with in no time. Just as he predicted, Dante used his body to blow hot fire at the atmosphere, the flame is hotter than hell's lake of fire, turning the clawed dark hands that are holding him and his brother into ashes and embers.
Vergil summoned a barrage of ethereal swords. The swords acted like a machine gun, blasting towards Westcott. Acting quickly, Westcott descended down to the forest, hoping the towering trees and giant rocks will act as a shield to stammer Vergil's attack. Sadly for him, the swords are almost seem indestructible and it cut through woods and rocks with ease. It continued advancing towards him like a missile that is lock on to its target. This isn't good, he knows if one of those swords catch up to him, he will be done for.
"I need to act fast or else...

Ending up in an open area where obstacles are lacking, Westcott landed hard on his feet, digging the dirt from the ground. He faced the incoming projectiles and summoned multiple spears behind him before blasting them off to go against Vergil's swords. Acting as a deterrence, the spears exploded into darkness and blue crystals after colliding with each other.
"These brothers are really stubborn!"

"Are you done running yet?! Take this!"
Westcott's eyes widened when Vergil suddenly appeared before him wielding one of his signature weapons, The Beowulf. His visions instantly went dark after a metallic fist landed hard on his face. Before he can fly off, Dante stomp on his back, feeling his spine snap in an instant but feeling his powers trying to heal it quickly before he can pass out. Thanks to his powerful regeneration, he keeps surviving the barely all of the lethal attacks throw at him.
"You won't be able to defeat them, not like this."

Westcott heard an echo inside his head, a deep raspy voice. The tone was disappointed by him, like a father when his son had done something wrong.
"Just hold on a little longer, power will soon be yours.."