The Battle wasn't going in Gardevior's favor.

The battle had quickly become more intense as Gardevior upped the ante by transforming. The brown-haired swordsman's vile smirk hadn't died, but it had become strained, like the parent of a disobedient child attempting to keep up appearances in public. His strikes were more violent, more forceful and more precise, striking at vital areas. Gardevior couldn't count the number of times she was nearly beheaded at this point.

Luckily, she had been able to keep up with him. Her speed had increased by an order of magnitude now that she was using the energy of her own cosmic radiation to boost her agility. Her strikes were far stronger as well, her kicks now hard enough to pulverize the bones of any normal creature. But to her horror, her opponent merely grunted in annoyance when struck and shrugged off the intense force. He was bruised and worse for wear, but not injured. Just mildly inconvenienced.

She rushed forward, evading another swing and striking at him with several quick jabs to distract him, but he effortlessly dodged before thrusting his blade at her. She crouched and sweeped his legs from under him, causing him to catch himself with his hands and kick at her. She jumped back fast enough to avoid another thrust, but he teleported behind her, striking the back of her head with his palm and following up with a roundhouse so hard she felt her skull give way a little bit. She crouched to dodge a third strike and landed a punch to the gut, sending him flying and landing in the sand on his feet.

"Well, you certainly have improved. I must say, I'm impressed."

She remained silent.

"I see, you aren't in the mood to talk anymore. Very well." For the first time, his smile faded into a condescending frown, one that a teacher would give to a student that failed to grasp a math problem. I guess I'll have to end this then."

Without even registering he had moved, She slammed into the ground after the brown-haired swordsman launched another swing onto her, cutting her chest and sending her tumbling through the sand outcroppings. Luckily, she recovered just in time to avoid yet another one of his lightning attacks, somersaulting on to her hands and then backflipping several meters away before retaliating with a shadow ball. The black orb raced towards it's target before her enemy raised his index finger with a smirk.

"Hado #4, Byakurai"

A much smaller bolt of lightning erupted from his fingertip, slamming into the shadow ball and punching through it before racing towards Gardevoir. She ran and quickly slid under it, allowing it to race overhead before she leaped upward and launched another shadow ball, but the swordsman disappeared in a flash, reappearing behind her and sending her flying to the ground with an axe kick so hard she felt the ribs in her back crack ever so slightly. She slammed into the ground, scorpion style, feeling the vertebrae in her back creak like rotting floorboards as she cried in agony, and collapsed for a moment, attempting to regain her breath. The swordsman descended, eyeing her in with what looked like a disappointed expression. He sheathed his blade and approached her while Gardevior struggled to regain her footing.

"I was expecting more from you."

"Sorry to disappoint," she spat, venom dripping from her voice, "but I wasn't here to impress you."

"No, I suppose not. But it's been so long since I've been near another sentient, and the boredom is maddening. I've been forced to replay the same events over again, day in and day out. The rest are like movie reels and snapshots, unchanging and eternal, but I am very aware."

Gardevior was noticeably confused by his wording, but he just laughed. "I suppose you wouldn't understand. You've never been in the mind of another like I have."

Gardevior's eyes narrowed. "I've been in plenty of minds."

"Oh, I don't doubt that at all. You move so fluidly inside the mind of another that it would be ludicrous to assume otherwise. But the key wording was 'like I have'. You've never been trapped in a mind, not like I have."

Gardevior took a step back. "No… that's impossible. It's impossible for someone's consciousness to exist outside of their body."

The brown haired man's smirk returned with a vengeance, an expression of sickly-sweet self satisfaction spreading on his face. "Maybe in this world, but where I'm from the concept is quite common."

"That implies there is more than one world."

"Why wouldn't there be? I'm sure there are separate dimensions here, places where the laws of physics warp. If not, then Tier Arron was dragged to such a boring reality by that… thing."

"What thing?"

Her opponent scratched his chin. "A creature that is hard to describe, as I was purposefully blinded by it. But I'm sure it will reveal itself eventually."

Gardevior took a moment to process this new information. Dragged here? By what? Then that would imply that Arron is at least not native to this world, possibly this dimension. He might not even be a pokemon.

"Why would anyone bring Arron here? To our world? And why in the hands of Goh of all people?"

Her opponent shrugged. "I am unsure. All I know is that he is far more powerful than you could possibly comprehend. Me? I've been shattered. I'm only at a small percentage of my maximum strength, and I can only exist in his mind for now. But you entering here, entering this place, changed everything. Now I can finally take over a far weaker vessel and be free of this hell."

Gardevior's eyes widened as his hand somehow grasped her neck in a fraction of a millisecond, strangling her effortlessly. She scratched at his hand in vain, attempting to free herself, but it was no use.

"Hey, dipshit."

Suddenly, he dropped her and grit his teeth. "I was hoping you wouldn't arrive as quickly as you did, I wanted to have fun before I disposed of her."

Behind him stood a young man, no older than twenty, with light olive skin and blond hair. He was around six feet or so, taller than the brown-haired man but not by much. He wore similar robes to those that her attacker did, but the sleeves were ripped off and he had a pair of fingerless gloves on. His eyes were a deep turquoise green, his nose was sharp and angular, and his lips bent in an irritated scowl. At his side was a sword similar to the one the brown-haired man had, but straighter and with a short broken chain hanging from the pommel. He had an inky hole in his chest, extending from his sternum to below his chest, about the size of a coconut. He had no visible bone fragment on his face, but his right forearm was completely covered in a bone gauntlet with razor-sharp tips, and his shoulders were as well, although it wasn't apparent at first since they conformed to the body.

He was an imposing figure indeed, and Gardevior was worried she might have a new opponent now.

The young blonde snorted condescendingly. "Yeah, well I hoped you wouldn't slice up my sister. Sometimes things don't go the way we want them to."

"I suppose not."

The newest arrival shrugged his shoulders. "Certainly not. Although, you aren't really Aizen, are you?"

"Oh, but I am."

The young man cackled. "I call bullshit. If you were really Aizen, you wouldn't be all bruised and bloodied, and you wouldn't be using such high level kido on her. Beings like us, were beyond her."

For the first time, Aizen became visibly uncomfortable. "Do not lump us into the same group, you are but a beast. I'm a nearly transcendent being."

The newcomers only cackled some more. "No, you're really an idiot. I nearly killed you. I cut off your arm and I nearly froze the other off. You believ3d had fused with the hogyoku, absolutely, but it had barely anchored within your soul. I would know."

The boy snapped his fingers, and a dim light shined underneath Aizen's coat where his chest would be. He ripped open his coat to reveal a blue orb encrusted within his chest, it's influence spreading out like a spider web of veins. But it quickly became engulfed in a light dusting of frost. Aizen's expression went from shock to disbelief to anger in a matter of seconds. "How did- how dare you violate the hogyoku, you worm!"

Aizen steadied his blade, but his expression once again returned to shock. The ice kept spreading, almost of its own accord. His breathing became labored as the ice solidified and began to crush his chest like the world's worst corset, forcing him to try and claw it off to no avail.

"You were always an incredibly smart individual, Aizen, but you were duped by both me and Gin. You never understood the true power of our Zanpakutos, did you? He was very interesting, the poison ability he demonstrated was perfect for killing you. Mine, however," the man drew his sword, the bluish-grey ninjaken gleaming in the eternal moonlight, "my true power was far more subtle." With a flick of his wrist, the Hogyoku was dislodged from Aizen's chest. He coughed up blood and sank to one knee, vomiting as it was ripped from his heart in a gruesome fashion. It floated up into the air and was carried to the blonde man's hand by a swarm of ice crystals. "You see, Muerte Congelada isn't the true name of my zanpakuto. It's more of a… misnomer, a pseudonym, if you will. It's true nature is far more sinister, so sinister, in fact, that once I met your former 'co-conspirator'," he emphasized the last two words with air-quotes, "and we joined forces, I decided to create a false release, to play into your own illusions. You took the bait perfectly, as I always pretended to be under your spell, consumed by your sword's shikai. Your own arrogance was and will always be your downfall."

Aizen was shaking with anger, obviously furious that he had both been tricked and out-maneuvered by both this warrior and his lieutenant of all people. The young man simply stood there as Aizen vented his frustration through his body language, taking great satisfaction in his main enemy's self-destruction. Yet Aizen composed himself, drawing his sword. "No matter, I don't need the Hogyoku to kill the likes of you." He held up his blade. "Shatter, Kyoka Suigetsu."

Yet Arron remained unfazed as Aizen began to shunpo towards him with murderous intent. He swung, but the blade was caught between the fingers of the blonde man with ease, and Aizen's expression faltered.

"I'm surprised you didn't fully comprehend the severity of the previous revelation. I'll spell it out for you." He stabbed Aizen through the chest, through his heart, and kicked him off of his blade, sending him sprawling into the sand. Aizen quickly recovered, but such a strike was devastating. Gardevior was forced to watch as this newcomer tore her attacker a new one. "My power isn't just ice, that would be incredibly cliche. In reality, my ice is more of an aesthetic feature, although it has its uses. My real power, however, is my ability to manipulate the reiryoku of whatever my ice touches, case in point, the removal of the hogyoku from your chest. It's why I could always manipulate it so elegantly, while Hitsugaya and Hyourinmaru, for example, are incredibly blunt instruments."

Aizen's eyes widened at the revelation. Gardevior had no clue what this newcomer was talking about, but it seemed incredibly complex. What was reiryoku? Who were Hitsugaya, Hyourinmaru and Gin? What was ripped from Aizen's chest? It all seemed like something beyond her pay grade, so to speak.

Why was she seeing this in Arron's memories? Arron wasn't here, it was two strangers. And both of them were sentient, unlike the memory husks that wandered the mind. What exactly was going on here?

Before she could contemplate further, Aizen stood up, gasping for air. He pointed at Gardevoir menacingly. "She has seen too much, she will spill your secret, our secret. She cannot be allowed to live," he rasped. "Would you endanger your life over this pathetic life form?

Gardevior tensed before returning to a defensive position and reignited her aura. She'd be damned if she'd die in this wasteland, to these freaks. She had to find another synapse, and fast.

But before she could get a clear psychic picture of her surroundings, the gravity seemingly quintupled, causing her bones to creak from the strain of standing up. Aizen and the newcomer, however, seemed unaffected. In fact, the pressure seemed to be originating from Aizen himself.

The newcomer sneered at Aizen. "I'm not surprised you'd stoop so low. Unlike you, however, I find her useful and I can keep her in line, both here and out there. But if you insist on attempting to kill her, I have no choice but to prevent that."

Aizen lifted his sword, but his expression was woeful. "I will kill her, I won't let her expose us."

"She can't, Aizen, because you're not Aizen. Just an imposter clinging onto hisnlast sense of purpose."

Aizen's expression grew less woeful and more angry. "I'll kill you!"

"You're weak. You're just a shell of your former self, a missing piece of a puzzle, a shard chipped from a blade left to rust on the battlefield. Nothing more."

"I'll stop you if I have to."

Aizen rushed forward, swinging his blade down at the newcomer, only for it to easily be parried by his plated forearm. Aizen was then kicked to the side and slid across the ground, hands and feet used to catch his balance before raising his arm and gripping it with his free hand. "Roar through heaven and hell, free yourself from the constraints of sin and subject those who imprisoned you to a thousand years of torment, east and west collide to spell doom to those who vanish with the sound of thunder! Hado #88: Hiryu Gekizoku Shinten Raiho!"

If the two previous magical blasts had been powerful, then this one was cataclysmic. Aizen's hand practically functioned as a cannon barrel, barely constraining the massive burst of energy surging forward from his palm, a violent force of nature shaped like a screeching dragon. It howled viciously and sparked with anger, seething from the sheer fact that the newcomer was alive and standing.

To his credit, the newcomer seemed unfazed, waiting for the blast to come near him. Then he raised his hand, pointing his index finger at the dragon and in conjunction Aizen. A light blue orb charged and increased in size rapidly, it's light engulfing the sand around him.

"Cero de la helada." He stated plainly.

The cero burst and ignited into a massive wave of frost, engulfing the dragon blast and halting it dead in its tracks. Aizen's eyes widened at the sight, and he raised a barrier just fast enough to redirect the blast away from him. What remained was something resembling a morbid ice sculpture, the blue energy of the dragon encased in a thick sheet of ice. The newcomer snapped his fingers and the entire figure shattered, leaving behind nothing but a few faint sparks and embers. Aizen seemed mortified by how easily the newcomer dismantled what seemed to be such a powerful attack, yet the newcomer reveled in his terror.

"Is that all?"

Aizen regained his composure. "Not yet." Je hissed, and began chanting another incantation. "Reap the harvest of death, pick the fruit of plague, ensemble the armies of men for the war to bring apocalypse, awaken the pillars of devastation, rejoice in their combined cataclysm and begin the world anew! Hado# 99: Goryutenmetsu."

Again, Gardevior was stunned by the continuous power that Aizen was able to command, this time summoning five massive dragons, each bigger than the previous spell he had used. The peered down at the newcomer and roared before launching themselves at him. He didn't move, he didn't even blink. He just swiped his hand, opening a massive black wall in spacetime and allowing the dragons to enter. Then, as the last charged into the eerie, inky portal, it snapped shut like the maw of an invisible beast. Aizen was shaking in fear as he stepped back from the newcomer.

" Negacions can be quite useful if you think outside the box, don't you agree?"

Aizen lifted his hand one more time, but the newcomer disappeared, reappearing right behind Aizen and gripping his wrist tightly before snapping it. Aizen howled in pain before collapsing.

"You deserve that. That was the strongest Kido you will ever release. You can't kill me, so stop trying."

Aizen sulked in his defeat, his raspy breath now more labored than ever before. "I can't let her reveal this, Any of this, we'll all be doomed you idiot."

"We'll all be doomed if she dies and I'm blamed. It'll be easier to swear her to silence."

Aizen wasn't convinced. "You're a fool and a liability. I'll have to take care of her myself."

With a flick of his good wrist, Aizen activated another Kido, this time without even a name. A massive black rectangle began to form around Gardevoir, blotting out the moonlight and causing the world to shimmer. She tried to move, but found the gravity to become even more unbearable.

The newcomer narrowed his eyes and disappeared in a flash, reappearing behind her. As the both of them were closed off from the rest of the world, she could see Aizen's devilish smile, his teeth stained by his own blood. Then everything became dark.

She felt warm hands grip her waist. "Hold onto me."

"What?" She asked, confused.

"Hold onto me and don't let go unless you want this black coffin to be your grave."

Without any further questions, she grabbed his waist and held on, feeling the force of the coffin constricting around her. The gravity increased a thousand fold, but the presence of the newcomer seemed to ward off the worst of the effects. After what felt like hours in the pitch blackness, the magic eroded, revealing a very different setting.

It was a town, a large one, but nothing like the towns she was used to. The buildings were drab, the roads filled with cars, and the air was far less clean. But the biggest difference was the lack of pokemon and people: the city was empty and quiet. The sun sparkled in the clear sky and very few clouds hovered overhead.

"Where are we?" She asked?

"Karakura town, the last place I want to be at the moment. I think I have a feeling why Aizen sent us here."

"Why? What significance does this place have?"

The newcomer sighed. "It's where I lost everything that mattered to me."

Gardevior was taken aback by his statement. The place where he lost everything? That made no sense, but she guessed nothing did without context.

"Who are you? What are you doing here? This mind doesn't belong to you."

The young man smirked. "Pot, meet kettle. But, this mind does in fact belong to me. You just don't recognize me in this form."

Gardevior refused to believe what she was hearing. "That's impossible. Arron is a pokemon… you're-"

"Not a pokemon? I've been trying to convey that but then I realized the implications of people truly believing that, so I decided to just accept that I would be treated like an animal forever. That is, until you came along," he cracked his neck absent-mindedly, "Aizen was right about one thing: you're a liability. I need to know if you can keep this under wraps until this can all be revealed at a more opportune time."

Gardevior was flabbergasted. "WHAT? Are you insane? Your mind is… absolutely… I… i don't even know, but it isn't natural. What the hell is going on here?"

"You've seen too much, I'm not telling you any more until I know I can trust you."

"First off, that's not how this works, and secondly, I have a feeling I'm going to see more, so why don't you spill your secrets right now."

In an instant, the newcomer lifted her up by her neck, strangling her. "Just because I saved you from Aizen does not mean I'm a Saint. I'll do what I have to to make sure nobody ever finds out the truth. Killing you wasn't my first choice, but I will if I have too."

She choked out a hiss, scratching at his arm to no avail, her nails grinding painlessly across his steel-like skin. "You're a monster!"

"Who ever said I wasn't? You simply traded one for another. The difference between me and Aizen, however, is that with me you have a chance to live if you shut the fuck up. Keep your lips sealed, or I swear that one day you'll regret it."

He threw her across the sidewalk before taking a deep breath. "Now that that unpleasant business has been handled, it's time to leave this place. I want nothing to do with this wretched city. Find a synapse, and fast."

Gardevoir huffed, but she began to focus her energy, looking into the subconscious to find another synapse, but none could be found. It seemed their business wasn't done here.

"There are no open synapses. We're trapped here for the time being."

The newcomer groaned. "Wonderful. Just fucking fabulous. Alright, I guess we're going to have to deal with whatever nonsense Aizen has pushed us into. I suppose we'll start with the most obvious."

She looked at him curiously, but he simply stared up at the sky. She followed his eyes, seeing two figures floating in the air. One of them was a young boy, no older than twelve, with his arms and legs coated in ice. He had massive ice wings on his back and a flowing white robe over his black clothes. He wore a grim expression, unlike his opponent.

The other was a tanned blonde woman with a zip-up, long sleeved crop top so exposing that half of her breasts were bare. A large sword was sheathed on her back and her mouth and nose face was covered by the collar of her crop top. Her skirt was similarly exposing, essentially a large white sheet held up by a tight-fitting black belt. Her knee-high heel-boots made her seem taller than she actually was.

"I'm so sick of seeing this play out over and over again."

She looked to see the newcomer's pained expression. His eyes were glistening, but he wasn't crying. His breath was shaky, as were his hands.

He drew his sword before turning to her. "This is just another memory, isn't it?"

She nodded, somewhat alarmed. "I- yes, this is one of y- a memory. All of this is just in the imagination of Arron."

The newcomer sighed, shaking his head. "You still refuse to acknowledge that these memories and this mind are mine, don't you? Can't you see that this form is my true form, and the creature in the real world is just a fraction of what I am, a cage? So be it. Maybe it's for the best that you deny that I'm truly Teir Arron."

Her mouth gaped. Yes, it was impossible for her to believe that such a simple pokemon was truly such a destructive force, that all of this were bastardizations of Arron's memories, that that human-esq body was his true form. She had to be hallucinating, and all of this was just a bad dream.

"Then I suppose I'll allow you to sulk down here then. I'm frustrated, I'm tired, and I'm sick of being the weak Arron trapped in the body of a badger of all things. I want to let off some steam, and even if this is just my imagination, it will feel really satisfying to kick the crop out of all these self-righteous pricks," he cracked his neck, and she noticed the murderous intent in his eyes. "And now I don't even have to hold back. I can use my full power this time. That's the best part about this."

With a leap that cracked the concrete, he raced towards the sky, leaving Gardevoir in the dust. She just sat down on a nearby bench, cradling her head in her hands. This wasn't going to end anytime soon.

Arron stopped once he reached the same level as all the other combatants. Harribel was still staring down Hitsugaya, Soi-fon was still being her insufferable self while maintaining her stoicism, and Starrk was facing down the clown troop that was Ukitake and Shunsui. They didn't seem to notice him yet, as if time was frozen still, but the illusion broke when Harribel swung her sword, dissecting the captain of the 10th division with ease, only to reveal his body was an ice manikin. He then attempted to run her through to no avail, since she simply dodged him.

He figured Harribel didn't need his help, and Starrk wasn't exactly struggling currently, so he decided to deal with the one he most hated first.

Soi-fon was already struggling against Barragan, which was no surprise. As.much as hebhated to admit it, barragan was one of the most dangerous Espada simply due to his ability to manipulate time. His respira ability was dangerous for sure, but how would you defeat an opponent you couldn't hit. It would be safe to assume that he and possibly Starrk would be the only two who could come close to killing him.

So Arron decided to intervene.

He jumped between Barragan and Soi-fon, redirecting a strike from her suzumebachi with a few hand movements so quick that the normal eye could barely register them before kicking her away. Barragan seemed annoyed that his prey was taken from him, but he didn't act too rashly.

"She was mine to kill, Arron."

Arron simply cracked his neck. "She's not really worth your time, now is she? Now why don't you go and mess with old man Yamamoto over there? He seems like a more worthy opponent."

Barragan shook his head. "Doing so would be suicide. I am powerful, but he is far more so. It is why we have wonderweiss."

Arron scratched his chin. "Then go and help your lieutenants. It seems poor Findor has already been turned into sliced lunchmeat."

He gestured over to the buildings near the bridge, where Findor's dying reatsu lingered. Barragan huffed. "I suppose I should, if I must. I'm still incredibly disappointed with Ggio."

"He was arrogant, like you."

"Watch your tongue, boy, before I cut it out and replace it with the rot of my respira." But Barragan was already heading over to deal with Hisagi.

Arron turned to Soi-fon, his expression immediately souring. "Now, I don't like you. I really don't like you, and you're the most annoying bitch on this battlefield. So I'm going to make this quick, not to save you any pain but to protect my eardrums from your insufferable yapping."

Soi-fon's expression scrunched with anger, which he had to admit was a bit cute considering she was nearly a midget. But she pulled out her sword and pointed it at him. "That's it, I'm going to kill you slowly and painfully."

"I find that Doubtful."

"You don't seem like the smartest fellow, so your predictions are most likely way off."

Arron's scowl turned into a bloodthirsty grin. "We shall see."

She flash-stepped behind him, stabbing her sword into his back only to find that it bounced off like he was made out of stone. Arron roundhouse kicked her in the jaw, sending her sprawling through the air. Before she could recover, he was in front of her, slamming his palm into her chest and forcing her to back away once again, losing ground to him. Soi-fon seemed surprised by the amount of power he was outputting, as her sword began to waver.

"I'm going to kill you, hollow, you can't prevent that."

"Logic dictates otherwise, Soi-fon."

Soi-fon growled, changing tactics. "Hakudo #30: Beak Piercing Triple Beam" she waved her hand in a triangle pattern before three large beak-like spears of energy raced towards Arron like bullets. But he wasn't fazed and simply twirled his fingers, the beams stopping in midair and becoming malformed before they exploded in a bright yellow light. Soi-fon was shocked that her Kido failed, her knuckles tightening on the handle of her blade.

"Look at your chest."

She looked down, seeing a spreading frost cover her chest and stomach. She attempted to get rid of it with her hands and then her sword, but scratching at the sharp ice crystals only succeeded in bloodying her fingers.

"You won't be able to use any more kido successfully, so you might as well try and fight me."

She remained silent, trying to comprehend just how he had intercepted the bakudo, but Arron answered for her. "My ability allows me to manipulate the reiryoku of my opponents. Including your kido."

Soi-fon's expression became enraged at the thought of Arron violating her reiryoku. She rushed forward, attempting to stab him with a flurry of strikes at his chest. When that failed, she held her sword downward like a dagger, focusing on it's reiatsu.

"Sting all enemies to death, suzumebachi!"

Much faster this time, Soi-fon stabbed him through the chest, breaking heirro with a wide grin and kicking him into the building below. Before he could get up, she was atop of him, stabbing him in the same place again. "Your arrogance got the best of you hollow. Now die!"

She crammed the blade in deeper, and Arron could feel it's venom filling his veins. But instead of dying he cackled, much to Soi-fon's surprise.

"That's cute. You think you killed me."

Soi-fon's eyes widened at the thought of her suzumebachi failing, but before she could unravel as to why that happened, Arron picked her up by the neck, nearly crushing her windpipe. "You really didn't listen to what I said earlier, did you?" He threw her across the sky, sending her through the air until she landed on another building close by. "The ice allows me to manipulate your Reiryoku, including your Zanpakuto. But you seem to be having trouble registering that, so I'll make it quick."

He pulled out this sword before holding it in front of her. "You'll get to see my release before you die. My real release."

His sword and body began to glow as he cackled mischievously. "Ensnare the world, Ventisca!"

A massive blizzard erupted from the ruins, covering everything with a thin sheen of ice. Chains could be heard clinking together like the ropes of hell, and Arron's maniacal laughter hadn't ceased.

Soi-fon felt a hand on her shoulder, and she turned around to see the last person she'd thought she'd see here.

Because behind her were no other Yoruichi and Urahara. "We'll help you, little bee."

Couple of notes

So I made up the incantations for the two Hado Kidos that Aizen used, because this Aizen is weaker than the real Aizen is. I hope Kubo would approve.

Secondly, while this is all a memory, the way memories work in this world that I'm creating is that every memory is part of the imagination: everything that differentiates from the original events is the equivalent of Arron daydreaming, and Gardevoir is acting like the anchor to allow Arron to dream lucidly. So he's essentially blowing off steam by beating up people from the past that he doesn't like.

Also, quick disclaimer: Arron is not at all a good person. He is actually quite a flawed individual, similar to the rest of the Espada. Especially since his aspect of death is hopelessness, so he doesn't see any real necessity to change when the outcome is hopeless anyway. It's not just for flavor, it's a legitimate part of his psyche.

It will take a lot for him to break that cycle.

As always, hope you enjoyed and leave a review.