Izuku Midoriya was the only one in his class who hadn't had his quirk develop yet. Every day and every night before he went to sleep, he told himself that one day his quirk would come and he'd be able to become a hero.

That day did come, but it soon turned out to be both the best and worst day of his life.

It was any other day at his kindergarten, with the resident bully, Katsuki Bakugou starting on his first victim of the day.

Once again, Izuku couldn't let him do that. If he wanted to be a hero, he had to act like one. Trying to get his always quavering voice under control, Izuku uttered out,

"S-stop, Kacchan! You're being really mean!"

Katsuki stopped and looked up to see who had said it, though he already knew who. A sneer showed on his face.

"Oh yeah? What are you going to do about it?"

Izuku gulped, but raised his fists nonetheless."I'm going to stop you!"

The blond haired boy stared at him for a moment before bursting out laughing, his lackeys joining in. Katsuki gave a few last laughs before growling,

"I'd like to see you try. Everyone knows you're quirkless. What are you gonna do? Cry me away?"

Katsuki fell into another fit of laughter. He raised his hand and sparks flew off his palm. "I hope you're ready for a beating!"

Izuku gave a yelp as Katsuki ran towards him, explosions already going off in his hands. What was he going to do? He had no means to protect himself. Instead, he closed his eyes and raised his arms over his face.

He expected the usual burn and impact of a fist against his skin, but Izuku felt nothing at all. He opened his eyes tentatively. Was this a new trick? Was Katsuki waiting for him to lower his guard?

None of that happened. Instead, Katsuki was looking at Izuku with confusion and surprise.

It took Izuku a short while to realize what he was looking at. He lowered his arms and his eyes widened at what he saw on them. A hardened black mass covered his forearms and spikes seemed to be protruding from them.

"What...What is this?" Izuku examined them in amazement. Was this his doing? Did he have a quirk? A quirk! "I-I have a quirk!" He couldn't help the excitement in his voice.

"Deku…" For once Katsuki's voice wasn't full of arrogance or meanness. It was...normal.

But Izuku didn't have time to think about that. He had a quirk! Looking back down at his arms, he pressed a finger against one of the spikes. It was sharp and Izuku jerked his finger away with a yelp.

The material was weird. Looking closely at it showed that it seemed to be swirling around, but it was as hard as concrete.

But how did he turn it off? Izuku didn't even know how he activated it himself. What if they were there forever? That would be a downside. He strained for a moment, imagining it being sucked back into his skin. That's where it came from, right?

Somewhat correct. Instead of sinking straight into his skin, the mass seemed to melt and swirl up towards the palm of his hands. That was where it returned to his body.

When all the black gunk was gone, all that was left was a perfect black circle, which took up most of the space on his palm, on each hand.

Izuku stared at his hands and gave them another examination. The dark pools only seemed to be on one side and Izuku wasn't able to poke through it.

At that point, one of the children that had gathered around Izuku and Katsuki had gone inside to tell a teacher and he was now outside, kneeling next to Izuku.

He took one of Izuku's hands in his and looked at it himself. "Wow, Izuku! Your quirk manifested! I guess you were just a late bloomer after all! I have to say, your quirk is quite cool!"

Izuku beamed with pride. "T-thank you!" Yes, he was just a late bloomer! He couldn't even believe this was happening. Repeating it in his head just solidified that feeling.

The next few days were full of Izuku being praised by his peers, teachers, and people in his neighborhood. He used almost all of his free time analyzing his quirk and figuring out what he could do.

So far, he had figured out the black pools on his palms seemed to be where the stuff came from. He didn't know how much was there, but if he made too much come out, then he became dizzy and tired.

Izuku learned that calling it black goo and "stuff" was kinda confusing. So he decided to name it "Void". He was proud of himself for coming up with it and found it "hero worthy".

He soon found out that he could make Void come out and solidify into whatever he wanted, as long as it was still attached to him. Tendrils, claws, blades, fists, and spikes were the ones he learned how to make first.

That was all he was able to discover in the week after his quirk manifested. Izuku found that one hero that had a quirk somewhat similar to him was Blood King, a hero that could manipulate his own blood. Izuku took extra notes on him, trying to understand his own quirk.

After his quirk developed, Izuku hadn't seen or talked to Katsuki at all. Whether Katsuki was actively ignoring him or there were too many people talking to him every day. Either way, it made Izuku sad.

Some part of his wanted a quirk so that Katsuki would stop bullying him and realize his worth and they could actually become friends. But Izuku saw none of this but made friends with others instead.

A couple of weeks later, when the initial buzz of getting his quirk wore off and he was back to being in the background. At least he wasn't being bullied anymore. And he could even stand up for others like a good hero would.

He came to regret that mindset after his unfortunate accident.

Katsuki wasn't blatantly ignoring him anymore, but still teased and made fun of him. But to Izuku, it brought back that feeling of normalcy.

After school, Izuku, Katsuki, and a couple of their friends were out in the woods. Like always, Katsuki was in front, and Izuku was in the rear. But that was okay since Izuku wasn't suited for leadership positions.

"This way!" Katsuki shouted, pointing his finger towards a fallen log over a river. It looked kinda high up, and Izuku didn't feel comfortable walking on it.

Katsuki started across the log, confidence in his step and a big grin on his face. Izuku wished he could be that brave.

Q

Izuku stepped tentatively on the log, balancing himself. Things were going well. That is until Katsuki's foot slipped and he tumbled off of the log.

Before Izuku even knew what was going on, he jumped down after Katsuki and reached his arm out.

"Kacchan!" Void shot out from Izuku's hand and formed into tendrils that grabbed Katsuki by the waist and moved towards the other side of the river.

Katsuki was gently put down on the grass and the void returned to his body. Izuku, on the other hand, was still falling towards the river. He let out a scream and hit the bottom head first. Izuku passed out instantly.

He woke up hours later in the hospital, with his mother beside him.

"Izuku! Thank goodness you're all right!" She grabbed him into a fierce hug.

It turned out that after he had lost consciousness, someone had taken him to his mother. Izuku was surprised to learn that it was Katsuki.

Izuku hadn't expected that at all but was grateful nonetheless. He was going to thank him when he got back to school.

Izuku stayed in the hospital for about a week, learning that he had gotten a concussion and cut his head on the rocks at the bottom of the river. He had to get stitches in a couple of places on his head.

When the doctors thought he was well enough to go home, they sent him out with instructions to not mess with the stitches. Easy enough for him.

Back at school, Izuku was bombarded by his peers, all asking what happened and about his stay at the hospital. He answered their questions but noticed that Katsuki wasn't even close to where the others were.

In fact, he was acting aloof, sitting alone at his desk and staring out the window with a bored look on his face. Izuku couldn't work up the courage to talk to Katsuki, not in front of all these people.

So he waited until after school to catch him.

"K-Kacchan. I came to say thank you for helping me after I fell." Izuku wrenched his hands together, unsure if this was the right way to go about it.

Katsuki stared at him for a moment before turning and walking out the door. "Yeah, sure, whatever."

It wasn't much of a" you're welcome" but, it was still nice to hear it from Katsuki.

Later that day, when he was at home and writing in one of his notebooks, flashes of pain kept appearing in Izuku's head, to the point where he had to stop and lie down.

He laid there, clutching his head and trying not to cry from the pain. But that was hard to do since it was so immense.

As quickly as it started, it stopped, leaving Izuku with a cool feeling in his brain. He sat up and took deep breaths, wondering if that was a result of his fall.

Something like that.

Izuku jumped at the voice. It sounded bored and had somewhat of a droning voice. But no one in the house was capable of making that sound.

Well, there is now.

"Who are you? Where are you?" Izuku looked around his room, trying to see if anyone was there, but it was only him.

I...Call me Dagger. I now live in your mind. Or brain if you wanna get factual.

"Dagger? But what do you mean you live in my brain?"

I live in your brain, dimwit! Dagger's voice was loud and resonated in his skull. I don't know how it happened, but it seems that I'm here now.

Izuku mulled over this for a moment. "So, are you like a voice in my head?"

Yes, exactly like that.

Izuku decided that the best course of action was to tell his mother. He had no idea what had happened to him. Maybe it was because he fell that one day. Could you even get something like that just from hitting his head?

Turned out that it was. The doctors said that the voice in his head was an auditory hallucination, which opened up a few possibilities of what he had.

The doctors weren't able to give him a clear diagnosis, so they sent him home, telling him to return if something else occurred.

Most of Izuku's attempts to talk to Dagger were shot down with a "Shut it." or "Leave me alone." Dagger reminded Izuku of Katsuki, with his confident demeanor and aloofness.

The days went by fast, with only minor occurrences, like Dagger talking to him. It was never more than that, so he never went back to the doctor.

But one day, all of that changed.

Katsuki was the first to notice. He knew Izuku enough to notice. Never had Izuku walked with confidence in his step. Izuku walked with his head and actually made eye contact. Katsuki found him unnerving, so he stopped him on the way to class.

"Oi, Deku! What the hell is wrong with you?" Katsuki crossed his arms and gave him a glare.

Izuku didn't even seem fazed, which was mother warning sign on Katsuki's part. "What do you mean, Kacchan? I'm as normal as ever." Izuku flashed a smirk and Katsuki knew this wasn't him.

Izuku's eyes were darker and narrowed, not like how large and bright they usually were. "Huh, you saw through me, huh? I knew you would. Izuku was right about one thing I suppose."

Katsuki watched with wary eyes as Izuku walked towards him. "My name is Dagger." He held out a hand for Katsuki you take, but Katsuki didn't reach for it.

Dagger scowled and returned his hand to his side. "Well then, it was nice to meet you too, you ass."

Katsuki's eyes flared and he growled. "What the hell did you say, Deku?"

Dagger himself growled. "I'm not Izuku, bitch! Didn't I just fucking say that?"

Katsuki didn't like how Dagger was talking to him. He raised a fist, spark already going off.

Dagger raised a hand of his own, Void coming out of the palm and forming a claw around his hand. He made a move towards Katsuki, but suddenly he clutched his head with his other hand.

"Fucking Izuku. I got this! I'm handling this!" He gave a groan of pain and gave a sigh of defeat. His other hand fell and Void returned to his hand. "Sorry, Katsuki. Izuku doesn't want me to play with you." He left before Katsuki could even react or say anything.

That was the first time that Dagger had taken control, but it certainly wasn't the last.

Multiple times a week, the two would switch control. The time they had under control always changed. Sometimes Izuku would prevail for two days and Dagger for half of a day.

It didn't take long for someone other than Katsuki to notice. Izuku's mother had noticed as well, and when Dagger could answer questions about Izuku's life, she took him to the hospital.

While there, they finally were able to give Izuku a diagnosis. After taking into account his past symptoms, they told him that he had Dissociative Identity Disorder.

Both Izuku and Dagger learned that Dagger was a separate personality, created sometime after Izuku had hit his head.

Izuku found this discerning. How was he going to become a hero if he switched who he was every so often?

Once again, he was hugged by his crying mother who was saying, "I'm sorry. I'm so sorry, Izuku."