A/N: So yeah, I got this new idea that just sprung up and it is just too good to pass up. He won't be a Villain from the beginning.
Also, the kind of villains I will put in his head will be varied. Some are sophisticated, some are comedic, some are cordial, some are psychotic, but all of them, without exception, are evil; don't expect to see any of redeemed villains (sorry Darth Vader), righteous villains (sorry Thanos and Wamuu), reluctant villains (can't remember one on top of my head), or even anti-Heroes (sorry Loki).
You don't need to know any of the villains beforehand. I will give you their context within the story. Probably the reason why I don't put this in the crossover section for FF net.
Heroic Heart, Villainous Head
'Hit him.'
Izuku heard someone say, but the only sound he could hear was the pain ringing in his ear after getting a full-face explosive blast. So where did the voice come from?
'That isn't important right now. Hit him.'
Izuku Midoriya, a four-year-old boy, looked past his fumbling defensive arms to look at his blond 'friend' Katsuki Bakugou.
"What's wrong, Deku?!" the explosive blond asked. "I thought you wanted to fight!"
"T-That's not it, K-Kacchan! You can't just bully other people!" Izuku pleaded.
'Do not ask an ant not to bite you. That's idiotic. Just squash it.'
The same voice reprimanded. This time Izuku heard it much more clearly — a male voice no doubt.
"Ha! And what can you do! You're just a Deku!" Bakugou insulted, sparks of explosion popped in his hands, while his two goons were looming in the back.
'Children can certainly be cruel and stupid, aren't they?'
Izuku began to realize that he wasn't hallucinating or hearing things, there was a mysterious voice talking to him. He then heard something akin to a sigh.
'Boy, it appears that I am stuck inside your head, considering that I hear your every thought,' the voice explained, then another sighed. 'Do you mind leaving the playground so we could discuss what is going on?'
"B-But I can't do that! That boy needs protecting!" Izuku shouted.
"Who the Hell are you talking to Deku?!" Katsuki yelled, readying to charge again.
'You do not need to talk aloud, I can hear your thoughts . Merely think about what you want to say,' the voice instructed. 'As for the boy you said you will protect, he had already run away.' Izuku immediately wiped his head around and, indeed, he only saw the empty spot where the boy he tried to rescue used to be. 'A sensible choice on his part, now that he was gone your… mission is done. We can go now.'
"Haha! Stupid Deku! That guy just got up and ran away and you didn't even notice it!" Katsuki just laughed along with his goons.
'Or perhaps not, I highly doubt this 'friend' of you is willing to just let us leave. So I will simply repeat my previous instruction: hit him.'
'B-But I can't! Th-that's not heroic,' Izuku replied in his mind as instructed.
'There is no 'heroic' or… 'non-heroic' about self-defence. Surely even the one as young as you can agree with that?' There was a short silence that was only broken when Katsuki finally ran out of patience and blasted his way toward the greenette.
"W-What do I do?!" The boy shouted, now in his full panic mode.
The 'voice' observed things through Izuku's eyes. The arrogant runt was rocketing toward Izuku, but it was a clumsy maneuver, much like everything that children do. Within a few milliseconds, he came up with a suitable counterattack.
'Once he is upon you, drop onto your back. Make sure to keep your neck forward so your head doesn't end up hitting the ground. Then kick or punch him in the chin. It should wind him up enough. After that, run.' He could have come up with something better, but it must be something plausible for a four-year-old to commit — better keep it simple.
Izuku braced himself, ready to do as he was told. So when Kacchan was right in his face, he leaned away and dropped onto his back, positioning himself below the flying blond. Being used to pain from being around Bakugou, Izuku did not even flinch upon dropping onto the hard ground. Instead, he followed the next step of the plan and shot his leg forward. It made direct contact with Kacchan's chin, but with more force than he thought he had.
Katsuki's Quirk immediately shut down as soon as its user went unconscious. He dropped right beside Deku.
Izuku and Katsuki's goon only stared with wide eyes at their defeated friend. Many feelings ran through the greenette, but he had no time to think on any single one of them when the voice spoke again. 'Hmm, another dog with a bark that is louder than its bite, but enough of that, stick to the plan and run.'
Izuku broke out from his dumbfounded state and sprinted away, uncaring about his destination.
The greenette ended up back in the confine of his room, back at his apartment. Just a few seconds ago, he had come in, quickly greeted his mother who was busy cooking, washed his hand, and came into his room; all of which was done almost automatically.
'Kacchan is going to be so angry tomorrow,' Izuku thought back to his action at the playground and dreading the school tomorrow.
'I would not be so worried about him. Though now that we have our peace and quiet, I suppose that we can finally have our talk,' the voice reminded Izuku.
'I-I-'
Izuku suddenly felt it, a pull of some sort. He didn't know what this feeling was, but he instinctively followed it. He suddenly felt tired and within a second his head hit the pillow.
When the little boy opened his eyes again, he was greeted by a barren circular room that was roughly the size of an inside of a large restaurant.
The only light source in the room was a flat lampshade on the ceiling at the centre of the chamber. It did well to highlight a lone figure in the room. The figure was sitting on a sofa in the middle of this void and staring at Izuku like he was expecting him.
"Ah, so you must be that boy," he said with a smooth masculine voice. "Please come closer to the light, I can't see you in the dark." Though Izuku couldn't properly see the man's face, he could feel the amusement in the stranger's voice.
Izuku timidly approached him, still looking around as if he was scared that a monster would jump out at him. He was a bit relieved that no such thing happened, but now he had the stranger to worry about.
Izuku can clearly see the man now. He had a handsome face, brown slicked-backward hair, and a piercing, if not ominous, soft brown eyes. He dressed in strange white clothing that was a mixture of traditional Japanese grab, rope, shirt and pants, but made in a… drastically different style.
"So, you must be Izuku Midoriya, I presume?" the man asked, putting on a thin smile.
"H-How do you know my name?" Then Izuku remembered he was forgetting something. "Sir?"
"Hm, so polite," the stranger mused. "As for your question, I will get to them, but now I have a bit of a question for you." The man's face turned serious and Izuku gulped. "Can you explain to me where I am?"
"U-Uh." Izuku looked around, trying to find any clue for the answer to the question that was just asked of him. "I am sorry, sir, but I don't know."
The brunette sighed, "I expected as much." He stared at the greenette for a good minute before getting up from his couch. "Follow me." He walked away and Izuku, reluctantly, followed. The boy was relieved that the adult merely walked up to the wall of the circular room. There, something rectangular reflected off the dim light of this place. "Can you see it?" Izuku nodded, though he could only barely see it with how dark the place was. He wished there was some more light here.
As if in response, all sections of the walls within the room were suddenly illuminated by the wall-mounted lamps that weren't there before. Even the stranger looked a little surprised. "You didn't happen to think about wanting more light here, do you?" the man asked.
"I…I actually did, sir," Izuku answered honestly.
"Hmm, then maybe my theory is correct, but enough of that for now. Can you read this out loud?" He pointed at a golden plaque embedded onto the grey featureless wall.
"Welcome. The following rules have been imposed upon you: 1. You are not capable of inflicting any harm upon Izuku Midoriya… that's my name!" Izuku shouted in surprise.
"It is indeed, now please carry on," the stranger urged.
"2. You are not capable of inflicting any harm upon each other… but who else is here?" Izuku wondered out loud, but quickly got back to reading off the rules. "3. This place can only be shaped and changed as Izuku Midoriya wills it. Is that why the light suddenly appeared?" Izuku asked, but the stranger only replied to him with a sigh.
"Midoriya, please concentrate on your given task," the man reminded him, almost like a stern teacher. The greenette bowed in apology before returning to the plaque.
"4. Whatever powers you possessed in life, Izuku Midoriya shall receive them. 5. You can never lie to Izuku Midoriya or other residences. 6. If Izuku Midoriya will perish, so shall you all. 7. Abandon all hope and despair. Those are the seven iron rules. Enjoy your stay within Izuku Midoriya's Quirk. Wait, this is my Quirk!" The boy cheered, the eerie atmosphere around him forgotten. Finally, he got his Quirk!
"I suppose you understand what 'Quirk' in this context means?" The man asked. His face remained stoic despite the boy's positive antics.
"Y-You don't know what Quirk is, sir?!" Izuku asked, shocked. Just who was this man if he had never heard about Quirk even once? What rock had he been living under?!
"You seem to have forgotten that I can hear your thoughts," the man explained casually.
"I-I'm sorry, sir," Izuku quickly apologized. "W-Well, Quirk is, like, something everyone gets when they are four and it gives you awesome power, like breathing fire or making explosions," the boy tried his best to explain.
"Similar to that boy who bullied you? The one who can make an explosion out of his palm?" Izuku nodded, his gaze turned away, not wanting to admit that his best friend was bullying him. "I see, maybe they are somewhat similar to Zanpakuto?" the man whispered before raising his volume back, "and your Quirk is a part of you, correct?" The boy looked confused but slowly nodded. "What I meant was, are they part of your soul? Or are they perhaps genetics?"
"Soul? Umm, I am not sure?" Religion wasn't particularly popular anymore in the Age of Quirk. "I remember that Quirk can be passed down through DNA, though I have heard of people with sentient Quirk that act on their own before. The doctor said that 'Quirks can sometimes become really strange and it can take a while to properly understand how they work.'" Izuku practically recited some of the words Doctor Ujiko said to him at the last check-up regarding the nature of Quirk.
"Hmm, so these powers are mainly genetics, but can, possibly, relate to the soul," the stranger muttered to himself, his formidable mind beginning to race as he dwelled on this strange new ability he had stumbled upon. "Well, this is certainly a peculiar situation I have gotten myself into." The stranger went silent as he held his hand over his mouth to contemplate further.
"S-So my Quirk trapped you here, sir?"
"'Trap' isn't the exact word I would use here considering my previous predicament. If anything," the stranger smirked, "I would consider this an improvement."
The stranger amused himself at the thought of his situation. While limited, this was much better than being locked up for… how long were those Central 46 sentenced to again? Twenty thousand years if he remembered correctly. Why was he in the clothes he used to wear in Hueco Mundo again? He had no idea either, but one thing was certain. The brunette looked down at Izuku, who was staring at him in confusion as to why he was smiling.
'This will be quite interesting,' the man thought to himself.
"Well, I suppose we can uncover the mystery of your 'Quirk' together, Izuku. After all, I am living in it," he reassured the boy with a smile; for once with some sense of genuineness in it. The boy fumbled a little that the stranger used his real name. Then again, they would be seeing each other a lot from now on. "Oh, but where is my manner? I haven't even introduced myself to you yet." He kneeled down to Izuku's eyes level to get a better look at the boy and vice-versa. "My name is Sosuke Aizen, it is nice to meet you."
"Y-Yes, i-it's nice to meet you as well, Aizen-san," Izuku greeted back with a polite bow.
"Oh, you don't have to be so formal. I believe we will become acquaintances in no time," Aizen's smile never left his face.
This was only the beginning of something grand, if not… villainous; a journey of darkness, hatred, and despair.
For the ex-Captain of the Shinigami would not be the last to arrive and the innocent young boy had no idea what was to come.
From the grim mistress to the clown prince of crime, from the one-winged angel to the prime of evil, from a priest who could feel no joy aside from others' sufferings to a witch as vile as a serpent, they would all come and Izuku would learn from some of the worst that the multiverse had to offer.
A/N: A short beginning, but any more and it would feel dragged out more than it should. Also, just so you know, 'Beyond and more' will update around this weekend.
