Blue and purple lightning filled the area in haphazard, explosive bursts. Two powerful nonhumans were clashing at incomprehensible speeds...

"Damn, she's pretty good... I can't afford to hold back...Too bad I don't have the luxury of enjoying it..." The Shidou's inverse thought. His enemy shared his opinion about him. They were both equally matched and had been at it for about an hour, using only melee for the first 45 minutes of it. His thoughts were cut off when a swift roundhouse grazed his hair, just barely dodged. It was countered with a swift uppercut, which was also dodged. He used the centripetal force to effectively follow up with a spinning back kick with his left leg and a dagger swing in sword grip with his right. The blonde saw it coming, ducked the back kick and dashed back to avoid the swing. Ai threw a volley of lightning bolts at her adversary's general direction, which were all dodged when he ran behind a nearby building. The lightning, which didn't hit a conductor or a target, dissipated right on the spot. For a moment, there was silence. Then, the sewer plate rattled and Shidou burst out at full speed. The blonde, caught off guard, suffered a scratch on her cheek and a crippling elbow to the ribs which sent her reeling airborne while destroying a piece of her armor. She caught herself and, with much resentment, withdrawed into a dark alley. It was more like a maze, with multiple twists, and turns that she knew he wouldn't be able to track her in. Finally, Ai spotted a back door off to the side and burst into it. Once inside, she caught her breath and thought about the current situation. She knew that she was at a disadvantage, as her enemy was somehow able to switch to different reiryoku at will while letting the other recharge. The stamina-based melee approach would be suicide. She couldn't use the fiery attributes of her boots as he'd just use Kotori's power to absorb that... And her spikes were useless against the thick steel of his broadsword... Then, it came to her. He's only ever used one power at a time, and backed up to a safe distance before switching abilities.

"If I can force him to switch at close quarters, then he'll be helpless against my speed!" Ai wondered why she didn't think of this sooner.

"What's she up to..." Shidou thought while surveying the area from the 15th story window of a random business building. He'd made sure to conceal his reiryoku, as the city's vastness and variety couldn't be made use of if he were sensed the whole time. Then, he saw her flying up, looking for him. He'd swiftly moved –on the stairs- up to the roof of the skyscraper, readying himself for another attack. Without hesitation this time, he sent an extension of his dagger swings with energy from a distance. He wasn't going to humiliate himself by falling for another afterimage... The figure faded and she popped up in front of him –as expected-, a sadistic grin plastered on her face. He swung at her quite excited to see her renewed confidence. The blonde ducked it and sent a scissor kick at his chin. Shidou sidestepped, and was pursued with a quick follow-up side-kick. He jumped back, but Ai sent flames out of her boots, forcing him to switch to Kotori's power(well, an inversed form of it) and absorb it. Ai's grin widened. "Now's my chance!" She thought as she excitedly charged. Her adversary's weakness was figured out and he'd soon meet his end. Or so she thought. In her excitement, as well as sadistic anticipation of killing him, her form loosened, her movements slowed, and her perceptiveness dropped. "Perfect!" Shidou thought excitedly, making sure that his facial expression and his internal glee were contradictory. His perpetrator's thoughts were cut off by a swift kick to the now unprotected vital area: the ribcage. A loud crack was heard and she coughed up blood. The shoe was on the other foot.

Shidou took full advantage of everything- her surprise, slowed movement, loss of focus, and encumbering wound. Since the cat was out of the bag, he went all-out, attacking with his daggers, flames, using wind to pull her back in after sending her reeling, and finished with a fire-boosted punch that sent Ai flying downwards at sound barrier-breaking speeds. She channeled all of her remaining reiryoku and slowly curved her path to make full use of the momentum while adding on to it so that her adversary couldn't catch up. She went as far as her energy would take her, widening the distance, and then plopped to the ground. In case she'd somehow been followed, she burst(through a wall, concrete was nothing to a spirit's body) into a nearby house and, taking advantage of the smoke, concealed her energy – what was left of it -while hiding behind the kitchen counter. However, Shidou instead saw an opportunity. He switched back to normal and, using the Yamai twins' angel, created a huge volley of haphazard wind currents into and out of the house while also putting up an ice barrier with Yoshino's power. Taking advantage of his enemy's restricted movement, Shidou inversed again and sent a flurry of purple energy-filled extensions of his dagger swings into every area that wasn't affected by wind, accelerated with an especially strong current he placed for this attack. Finally, he finished with a dome of fire sent on top of the house's rubble.

"Crap! Way different than the way I planned it!" The trapped inverse was now held in place by a wind trap. Had she stayed in her hiding spot, her energy field wouldn't have lasted. He had her right where he wanted her. The surrounding fire made it hard for her to breathe, as all oxygen was being absorbed to fuel the flames. In the blink of an eye, she fell to the floor, unconscious. The victor ceased his attack and placed wind-based cuffs on all of Ai's limbs just in case she woke up. He decided Fraxinus' crew wouldn't be able to help and stayed amongst the rubble, waiting for her to wake up. After about 3 minutes...

"!" Ai's eyes(LAWL, see what I did there- OW! Shidou! You KNOW that was funny! ;-;) shot open, filled with madness. She struggled for a good 30 seconds before it registered that she was being restricted. She mentally cursed for a good 15 seconds before noticing Shidou right in front of her.

"You've won... Do what you want to me." Her inversed self said bluntly. The now blue-haired teen stood up and said:

"Ai, I know you're in there! Wake up!" He pleaded.

"She can't hear you. I've got her under my contro-" She was cut off by a punch to the gut. She coughed for 8 or 9 times.

"Listen, fight it! You're stronger than Phantom! Don't let it control you!" Shidou amplified his voice with reiryoku, hoping that it'd penetrate to the darkness where she was locked away.

Deep inside Ai's pupils, a light sparked. Then, he saw Ai banging on her crimson red eyes.

"Help! Shidou-kun! The darkness... it's got me! Help-" Dark tentacles covered her mouth and dragged her away as she was crying.

"Ai! Let go of all doubt! Believe in yourself and in me! The darkness is a manifestation of what's in your heart!" But it was too late. His voice could no longer reach her. While he looked down solemnly, a laugh interrupted his train of thought.

"See!? She's mine. All mine! I've gotta hand it to you, though. It's all thanks to you!" Ai's counterpart laughed.

"...What do you mean?"

"She got into a fight with her best friends while defending her lovely little boyfriend-"

"HE'S NOT MY BOYFRI- mmph!" Ai had fought that hard just to get that little piece out.

"Shut up, you worthless little wretch! Anywho, it obviously didn't go well. Then, of course, darkness began to sprout in her heart faster than Phantom'd ever seen! She immediately gave me the opportunity to awaken and possess her in one fell swoop... Now that she's caused a spacequake, the darkness only spread exponentially faster as she began to think that you'd hate her. Ironic isn't it? To stand up for you so passionately then to be scared within a couple of minutes to see your face...You, the person that she chose over her childhood friends caused all of this! Hahahhaha! It's just too funny!" Shidou had stayed silent, everything she said was his fault. He blamed himself more than she did. But, he cared too much about Ai to let it go like this.

"There's one way..." Shidou stated while looking down, letting his hair cover his eyes and walking forward.

"What're you- AGHH!" He put his hand on the inverse's head and began sending a massive amount of reiryoku into her.

"Wh-what're you-"

"Overloading her with my reiryoku. She'll implode, but I'm sure she'd prefer that to being used to kill innocents."

"Why you..." Shidou didn't reveal his real plan. White light began to pour out of every part of Ai's body that would allow air in. Soon after, her body expanded and then, just like he said, exploded. But at the last second, he surrounded her with his blue flames. Shortly after the implosion, she was back. He quickly inversed and forced himself into her head with the same possession method in that split second that she was in the process of being taken over by the same spirit a second time. His plan succeeded and he made it inside. It was dark, but he could see well enough. At a distance, Ai was being choked by the spirit he just fought.

"AHAHAHAHHAHA!" Ai's counterpart was laughing maniacally while choking her victim. Shidou used air currents on her limbs, rendering her immobile. Ai dropped to the ground, coughing and nearly limp, struggling for air. Shidou walked over to her and hugged her while shedding some tears.

"I'm so sorry that I caused all of this pain and suffering for you Ai. I never meant for this to happen..." Before the recovering girl had a chance to respond, he got up and walked over to the restrained spirit. Lifting up one dagger, he performed a horizontal slash, from the right shoulder through the heart, across the ribcage. The inversed spirit did nothing but smile sadistically before dissipating. He grabbed Ai's hand and reverted to normal, which ended the possession. Soon, they found themselves standing atop a lot of rubble. Ai's eyes widened in realization.

"...Did I do this?" She asked hesitantly.

"Your counterpart and I had one hell of a fight." Her savior answered somewhat sarcastically.

"You're explaining everything later..."

"Yeah yeah."

"Shidou!" Tohka yelled as she tackle hugged her object of affection.

"Hey, Tohka! Totally nailed that inversion reversal, don't ya think?" Shidou said while refraining from hissing in pain.

"I don't really get it, but great job, Shidou!" Tohka beamed.

"..." Ai was getting angry and she didn't know why.

"Tohka, meet the new spirit, Yamabuki Ai." Shidou pointed at Ai, whom was already acquainted with Tohka.

"You're a spirit now!? Yay, that means we get to live in the same place!" Tohka squeezed her new roomy with the force of a beast. Ai was choking.

"I... can't breathe... Spirifua?" The blonde passed out.

"Ai!?" Tohka and Shidou yelled in unison and worry. They began carrying her over to the place where former spirits resided. They were greeted by Natsumi.

"Hey, Tohka-chan and Shidou-kun- OWOWOWOWOWWWWWW!" Shidou pinched her nose incredibly hard.

"That's what you get for using my body to prank Tohka again." The aggravated azure-haired teen scolded.

"That was you!?" Tohka shouted at the shocking reveal. She then cracked her knuckles while emitting a malicious aura equal to that of Shidou's while he was fighting Kurumi.

"Uhh... Want cake?" Natsumi gulped.

"Not gonna work this time..." Tohka stated, her tone screaming the word death. Shidou was right behind her.

"Tohka?"

"Yes?"

"I give you permission to use your spirit powers."

All hell broke loose.

Next Day

"Ughh..." Ai held her head in pain as she woke up. The ceiling was a different color, and the bed felt different. She realized immediately that she was in a different room and shot up.

"Finally woke up? Guess Tohka squeezed you harder than we thought..." Shidou said mostly to himself.

"Where am I?"

"Remember when Tohka said you two could live in the same place?"

"Vaguely."

"That's what's happening."

"But what about my parent-"

"I already know that you live alone." Shidou interrupted, stopping Ai's attempt at getting out of her situation.

"Shucks..." Suddenly, Shidou stood up from his chair and sat on the side of the bed. He was looking at her intently, causing her to blush.

"Sh-Shidou-kun?"

"You're a spirit now." She had the same astral dress, but with white replacing black and orange replacing the red, as well as a the lightning blue streaks in her hair. Damaged as it was, it was undeniable.

"What? I thought you got rid of-"

"That was the evil counterpart of you that had caused you to inverse."

"Oh, so that's why I was getting trapped by darkness earlier..."

"You know what happens next, right?" Shidou smirked mischievously.

"Huh?" Ai took a good 5 seconds to figure it out before blushing furiously.

"B-b-but I don't even l-l-lo-" She was cut off by a pleasureful kiss.

Me: Phew! Just barely made quota- I mean released this in time! Wasn't that last part adora- OW!

Ai: *Blush*

Shidou: Aww, come on, you know you liked it~

Ai: Sh-shut up. Or else. *Aims oversized minigun at us*

Shidou and I: o-o... *Puts arms up in surrender*

Ai: ^_^ *Lowers minigun and walks away*

Shidou: *Whispers into my ear* She totally digs me...

Me: *Whispering too* Seriously, what a tsundere...

Ai: Hm? *Chambers bullets and loads ammo*

Shidou and I: *Runs for dear life*

Love it? Hate it? Leave a review! I'll be alternating between the RWBY fanfic and this from now on, and thank god I just barely made that 2300 words – though I had to make this extra section to do so- cough cough... Until tomorrow everyone!