A demon?

Akuma started hyperventilating. Why did he kill them, and why did he eat them? Why, why, why, why? He was disgusted and angry at himself. What was that, and why did he just lose control?

He looked around him and saw the bodies of his previous victims viciously eaten by himself.

"What am I, and why do I want to eat more?" He said it with pain in his voice.

Akuma wasn't used to this; he was just a normal person before he transmigrated, and then he became a sick kid in the world of MHA. So why did he feel so good while doing it?

"I need to clean this up," He muttered to himself, and he started to think about what to do. He sighed and started trying to think of what to do with the bodies. What was he supposed to do? His fingerprints were probably already everywhere. He did the next best thing.

"I should start just crushing the bones, I guess?" He wasn't in the right mind right now; he literally just committed murder and ate them.

*crack*

*crush*

Akuma started to crush the people's bones into powder with ease, still trembling and with a pained expression on his face. After he did that, he didn't know what to do with the blood everywhere. Then it happened.

'What should I do? How am I supposed to clean up this bloody and disgusting smell? He thought. But then, like an instinctive reaction, it started happening. He started lifting his hand up slightly, making the blood float, and he tried to combine it all into a small orb or something similar. And he did just that; all the blood changed into a small orb; the foul smell was still there but a lot better.

"What the? Can I control people's blood? At least I know I'm not a ghoul, but what am I then?" He said, while picking up the strange object, that it was the size of a peanut. He didn't know what to do with it now, but he would know later. Maybe he could just hide it somewhere where you wouldn't notice the smell. And he did just that; he walked to a sewer and threw it in there.

He wiped off imaginary sweat and felt like a weight had been lifted off his chest a little. "That's done, finally. Let's hope nobody thinks I did anything," He said with a tinge of hope.

"I want to see more, I'm curious about what everything looks like.," He said to himself. After staying ill for that long, he just wanted to truly see what the outside world looked like and not think about what just happened, so he started walking away from the scene and started exploring the place.

Some time passed while he was walking around this city, and he found a small cat on the street and walked up to it. And tried to pet it. But it instantly scratched him.

"What the hell?" He said there was blood leaking from where the cat scratched him. But strangely, it didn't seem to hurt him in the slightest.

"NYAAAAH!" The cat screamed at him, walking away from him.

He had a slight sweatdrop. The first time he ever tried to pet a cat, it just scratched him and started walking away. "Wait up, little buddy." He ran to the cat, trying to catch up, making the cat look back.

"Calm down, I won't hurt you," He said, trying to get the cat's attention, but the cat just ignored him.

'Why did the cat just run away from me? Am I that scary to him?" He said it with a sigh, looking at his wound.

'Wait, where is my wound? Didn't I get scratched here? I literally saw the blood.' He thought, inspecting his hand, not seeing any wound.

'Do I have some sort of high-speed regeneration? While I felt the cat scratch me, I didn't feel any pain. Is this part of my new powers?' He thought in a thinking position.

While he was thinking about this, he heard the sound of something behind him. but when he looked, there was nobody there? So he started walking there like a curious child and saw nothing. So he started walking more and more until he reached a person on a bench just humming a song.

Was that what he heard? But he walked like a mile to get here. How did he hear her just humming? Not wanting to disturb her, Akuma started walking away before looking straight at the person's face. She had slightly pale skin, black hair, and blue eyes. She seemed to be shining in the moonlight, making her look even more beautiful than she already was.

Akuma just walked away, not caring much about how a person looked, because he felt something strange. He felt like he had to get somewhere with closed doors. His instincts were screaming at him to go inside. So he started walking back to his house; it was already late and he also needed to get back. When he got there, he sneaked back into his room by climbing back up, closed his window, and just went back to his bed like nothing happened. A half hour later, he felt that feeling again about why he shouldn't go inside. It seemed to be because of the sun.

"Why am I so scared of the sun? Is it still dangerous to me?" Akuma said to himself as he started to walk to his window and put his hand in front of the window, but he instantly felt like screaming.

"DAMN IT!" he screamed to himself in pain; his hand had burned away the second the sun touched it. He looked at his hand, and it started slowly regenerating, but he was truly shocked. He quickly went back to bed with a pained expression on his face.

"Let's never do that again; it seems my weakness to this new power is the sun, " he said. It hurt him with an intensity that seemed to pierce through every fiber of his being. It was like his hand was getting pierced by thousands of needles. A few seconds later, his hand grew back like nothing had happened. And he started inspecting his hand, looking for any things that weren't there before, but he couldn't find any.

"What am I? We can rule out ghouls and anything that can stay in the sunlight. We can also rule out vampires since I didn't just drink the blood of those gangsters; I literally ate them until there was almost nothing left. Let's think back to when I got my powers. The doctor gave me a strange medicine that he got from a flower. After that, I started to want to eat people, and my appetite became horrible for anything else. I have super strength and it seems I also have some super speed and high speed regeneration" He said while thinking.

Then it hit him like a bullet train: "Wait, am I a demon from Demon Slayer? Didn't Muzan himself have a similar backstory to mine? He had some medicine and became a demon after killing his doctor. He was also sick like me and had the same type of powers, but he didn't have the blood manipulation I had."

Maybe Akuma was a mutation or just had a different power, but he at least now knew what he was. He was a demon, a creature of the night made to kill people. And he wasn't just a normal demon; he was the demon progenitor of this world.