Demonic Hero

Disclaimer I don't own My Hero Academia or Fire Force. I got this idea a while back by reading a story where Izuku took the place of Shinra. Shinra will be in this story and will go on to be a Fire Solider while Izuku goes on to be a hero. I also decided to make Izuku more like Benimeru Shinmon. This includes giving Izuku powers like Benimeru Shinmon's therefore Izuku will have both second and third generation Fire Solider abilities as his quirk. Now without further a due, on to the story!

On a playground we see a child with dark green hair that's spiked in several different directions causing it to cast shadows on itself, tan skin, emerald eyes, and two sets of freckles in a diamond formation one on each cheek. This boy stands at the height of 3'6" which is rather tall for a five year old. The boy's name is Izuku Midoriya and he's standing in front of the only friend that didn't turn their back on him when he found out that he would be a late bloomer. This friend is a girl with straight black hair that reaches her shoulders, light skin, yellow cat like eyes, and stands at 3'4". This is Tamaki Kotatsu and her quirk allows her to use fire to become a two tailed cat with flaming ears. In front of Izuku is his other friend, this is a boy with light skin; ash blond spiky hair, crimson eyes, and stands at 3'5". This is Katsuki Bakugou. Katsuki looks at Izuku with a glare "What are you doing getting in my way Deku?!"

Izuku growled and attempted to be intimidating "I'm going to stop you Katsuki! Now walk away, you've already made Tamaki cry enough."

Katsuki and the two boys behind him merely smirk at Izuku before activating their quirks. The boy directly behind Katsuki grew a pair of red dragon like wings from his back and flew a few feet off the ground. The boy standing to the right of Katsuki while still standing behind him causes his fingers to extent. Katsuki on the other hand started to have small explosions in both of his hands. Izuku had his right foot slide back slightly in fear before he gained a determined gleam in his eyes and took a defensive stance "You three won't hurt Tamaki anymore!"

Katsuki and the other two boys growled at Izuku before they charged at him. The three boys proceeded to beat the shit out of Izuku while he simply stood there and took all of their attacks with only pained grunts showing that their attacks were affecting him. After about ten minutes Katsuki got to frustrated and went to launch a large explosion that would harm both Izuku and Tamaki. Izuku crossed his arms in front of him while making sure that he was in front of Tamaki. When the explosion hit Izuku's arms he swiped his arms and caused the flames to disperse into thin air. Katsuki and the two boys with him saw Izuku's eyes glow an emerald green. It was at that point that a wave of flames flew towards the three boys in front of Izuku. The flames didn't burn any of the boys but they did cause a small explosion that knocked all three boys on their backs after they flew five feet back. Izuku looks down at his hands and noticed that they were on fire but not being burnt. Izuku soon realized that he had just awakened his quirk and smiles softly "Well it looks like I'm a pyrokinetic just like Tamaki. Wonder what else I can do with my quirk; I'll have to study it more thoroughly later. Now back to you three."

Izuku looks at the three boys that had just gotten back to their feet with a glare on his face "All three of you need to leave before you really upset me, we all know that a newly awakened quirk can be rather dangerous and since I just awakened mine it would be safer for all three of you to leave so I don't have to use it on you."

With that two of the boys took off with fearful expressions while Katsuki smirks and walks towards Izuku "Well, well looks like you finally have your quirk Izuku, now we can be friends again. All you have to do is turn around and hit that cat girl with one attack."

Izuku growled while Tamaki looks at Izuku with some fear in her eyes. Izuku calms himself down and turns his head enough to look at Tamaki with one eye "Don't worry Tamaki; I'm not going to let anyone else hurt you ever again. That includes me, I promise."

His words allowed Tamaki to relax and she smiles at the boy protecting her 'My own personal hero! Thank you Izuku, for coming to my rescue.'

Izuku turns back to Katsuki fully "You're not my friend anymore Katsuki, so you should follow the two lackeys of yours and run away. I'm not going to let you tell me what to do anymore. As far as I'm concerned you're not a future hero, you're on the path to be future villain. Heroes help others, you just want them to fear you and that's what a villain would want. Now get out of my sight."

Katsuki scoffed and shoved his hands into his pockets before walking away. Izuku watched him walk away until Katsuki turned a corner before he turned to Tamaki with a smile. Izuku saw that her shirt was burned in several places, he took his jacket off and draped it over her shoulders "You should wear this so that no sees without your shirt."

Tamaki pulled Izuku's red jacket tighter around her and smiles at him "Thank you Izuku. It means a lot that you're giving me your jacket."

Izuku nods and looks down at her "Are you able to walk on your own?"

Tamaki nods and tries to stand up only to start falling after she tried to take a step forward. Tamaki closed her eyes and waited to face planet on the ground only to feel two warm and somewhat strong arms turn her so her back was facing the ground and wrapping around her, Tamaki smiles and snuggles close to the warms she feels. She soon opens her eyes and sees the concern emerald pools looking down at her. Izuku gives her a reassuring smile "I'll carry you home since you can't walk on your own yet. You just rest while I get you home alright?"

Tamaki nods and rests her head on Izuku's shoulder while having her face buried in the side of his neck. Izuku puts one of his arms under her knees while wrapping the other around the middle of her back before standing up. Izuku carried her to her house which was right next to his. Izuku gently kicked the door and waited for someone to open it. Two minutes later a man with white hair slicked back into a small pony tail with an eye patch covering his right eye answered the door. Than man was tall and had a great deal of muscle however it was clear that he wasn't a body builder, his skin was also tan. This is Leonard Burns and he looks down at Izuku "Can I help you young man?"

Izuku nods and smiles at the man "Yes, Mr. Burns I've brought Tamaki home since she got hurt by Katsuki and two others before I got there. I did send them away after I awoke my quirk. I did make sure not to harm anyone since I don't have a lot of control at the moment. Now I would just like to hand her over to you as her adoptive father to make sure that she's in good hands."

Burns nods and takes his daughter from Izuku "Thank you for protecting my daughter, Izuku."

Izuku smiles "I'll always be there to help her with anything she needs if she gets in over her head. I know she'll be able to protect herself more as we get older but no one can do everything on their own. That's why I'll always make sure to keep her safe no matter what; she's my best friend after all. Oh and since she's asleep please tell her that she can keep my jacket since I have a few others so she doesn't have to worry about returning it to me."

The father watched as Izuku waved while walking to his house, Burns than looks down at the girl in his arms and smiles "So how long were you going to pretend to be asleep while Izuku was here?"

Tamaki opens her eyes with a massive blush on her face and smiles at her father while pulling Izuku's jacket tighter around her "I can't believe he said all of that to you daddy."

Burns nods and walks into their house while gently closes the door "Well, he'll be a fine man when he gets older. I can't wait to see what kind of hero he'll become one day, Izuku may very well become an even greater hero that All Might himself. The future's bright with people like him and that Shinra kid I meant a few weeks ago."

Tamaki looks at her father and nods "I know and Izuku's already a hero, he's my hero and that's all I need. Though I won't always need him it's nice to know that he's going to be there when I do need him."

Burns nods and lays his daughter in her bed "Well that's great and all sweetie since I'm not always going to be close enough to you in order to help you but for now you need to rest. It's the best way you're going to heal at the moment. Now get some sleep, you can see your hero at school tomorrow."

Tamaki nods and closes her eyes before falling asleep. Burns gently closes her bedroom down and smiles 'Well I can see Izuku becoming the world's greatest hero if he keeps his determination as strong as it is right now. I'm putting the future of my daughter in your hands when I'm not around so don't disappoint me kid.'

Ten Years later

A fifteen year old Izuku had gown quite a bit in muscle mass due to his training. Next to him is the only friend he's had since he was four Tamaki. She had grown into a rather beautiful young woman. Izuku however knew that she had a bad habit of suppressing her full power. Izuku knew that she had to learn about it herself since she was doing it subconsciously. Izuku looks down at her since she was only 5'5" tall while he was 6'0". Tamaki noticed he was looking down at her and looks back up at him with a raised eyebrow "What are you looking at Zuku?"

The boy smiles and starts to rub the back of his head "Sorry about that, I'm just thinking back through the years since we were four. Now we should get going before something goes wrong."

At that moment the two of them heard a small explosion before they heard people screaming. Izuku sighed "Just like that. Well we better go see what's going on so we know if it's going to slow us down from getting to school on time."

With that the two of them start to walk towards the scene. About half way there the two of them noticed that it was still a far distance away. Izuku kneels down "Get on my back Tamaki; we need to make it there fast since we're going to be running behind for school."

Tamaki jumps onto Izuku's shoulders and smiles "It's better for me to be up here since I get to see farther away with you being so tall."

Izuku smiles and stands up while grabbing both of Tamaki's ankles "Before you ask, yes I'm grabbing your ankles because of your 'Lucky Lester Lore', now grab some of my hair and hold on tight. I don't want you to fall off and getting hurt."

Tamaki does as Izuku said and screams in joy as Izuku jumps into the air before having fire shoot out of his feet causing him to fly as if he was a jet. It took them two minutes to get to the scene when it would have taken them ten or fifteen minutes of walking. Izuku landed on the ledge of a roof of a nearby building. Izuku looks down to see what was going on and how long it would take to finish up while Tamaki watched the heroes in action against the large villain. The villain appears to resemble a rather large man with the head of a tan colored shark. Izuku saw that there were three heroes dealing with the villain and the civilians at the moment so he figured that it wouldn't take long. Izuku decided to just watch the action since it would be easy for him to make sure that he and Tamaki got to school in time. When the two of them saw Kamui Woods show up they figured that the fight was over. However Izuku saw a giant woman running in their direction. He quickly flipped Tamaki off his shoulder and used his body to shield her. Izuku was glad he did because he grunted as several small shards of ruble smashed into his back. Tamaki pulled out of his arms a couple of minutes later and smiles at him "Thanks Zuku, I'm glad you were here since I don't know if I could've dodged all of the ruble that came in our direction."

Izuku shook his head "It's no problem; you're one of the few precious people I have, so it's my pleasure to make sure that you don't get hurt when I can help. I'm not calling you weak since I know better but I do know that you don't have to do everything on your own. Now you should climb back onto my shoulders so we can get to school."

Tamaki nods and Izuku turns around. Tamaki gasps when she sees the damage his back. Izuku had several holes in the back of his red muscle shirt and she could see blood coming from the wounds. Tamaki gently touched his back "Zuku, your back is really damaged. You should get seen by the medics down below."

Izuku shakes his head "There's no reason, I'll just get a note from our teacher and have the nurse wrap my back since none of the wounds are that bad. I'll be fine trust me. However since I know you won't want to climb onto my shoulders like this I'll do something different."

He then proceeded to lift Tamaki into his arms bridal style causing her to blush; she soon smiles and snuggles into his chest while resting her head on his shoulder with her face blocked from view by his neck. Izuku then launched the two of them into the air before having fire form wings out of his back. What should have been a twenty minute walk was a five minute flight since Izuku can move faster in the air. Izuku gently landed just outside the entrance to Aldera Junior High School. He lowered Tamaki to the ground so she could stand on her own feet. After that the two of them walked into school and went to class where Izuku kept his promise to Tamaki and asked their homeroom teacher for a note so he could go see the nurse. Five minutes after the late bell rang Izuku walks back into class and quietly went to his seat. The rest of the day went by normally for the two friends. During the last class of the day the teacher walks into the room while holding a stack of papers. The teacher starts talking but Izuku didn't bother listening since he didn't care what the teacher said. Izuku knew none of the teachers liked him due to the fact that he didn't bother showing off his quirk like most others. They did know he was incredibly powerful but no one other than Tamaki knew just how powerful in school. The only other people that knew about his real power were his mom and Leonard Burns. Izuku noticed the teacher throw the papers in the air and decided to listen to what's said from now on. However he decided this at the same moment that Katsuki decided to go a small rant about how he was going to be the best hero ever even surpassing All Might. Izuku chuckled "That's not going to happen since you can't beat me; on top of that I also know that your attitude won't give you any fans. At best you're just the next Endeavor."

Katsuki hears Izuku and turns to him with a look of utter rage on his face while also have small explosions going off in his hand "What the fuck did you just say Deku?!"

Izuku sighs and props his head up with his left hand before looking at his former friend with a lazy look "I'm only telling you the truth. I mean Endeavor has solved more cases then All Might while also putting more criminals and villains in jail when compared to All Might. Yet the number one hero is still All Might. I looked into how the hero list is made and found out that the reason All Might is ranked higher than Endeavor is because All Might inspires the people to do better while also making them feel save when they hear his voice. Endeavor just doesn't work with the crowd that's around some of the scenes he's working at very well. If Endeavor could figure out how to be nicer to the people than he'd be the top ranked hero by now. You act the same way as Endeavor while I just want to help people. To be honest I don't really care if most people know my hero name while I'm working, after all I'm not going to be a hero for the fame like you. My only goal is to make the world a safer place for future generations. Now sit down and shut up before you push me too far."

Katsuki growls before pointing his right hand at Izuku and setting off a decent sized explosion. Everyone else besides Tamaki looks on with worried looks on their faces only for them to change into surprised ones when the smoke clears. They all see Izuku sitting in his chair without any signs that he had an explosion fired at him. Instead Izuku was holding a small ball of fire in his right hand "Well that could've been bad had you accidently harmed someone or destroyed school property Katsuki, you really need to be more careful with that quirk of yours."

With that Izuku closes his had around the ball of fire causing it to go out. His hand gave off two small smoke trails from each side that quickly dissipated while looking at Bakugou with a stern expression "If you ever harm any innocent civilians or someone you're working with you have better hope I never find out. If I do I promise you that you'll wish you had never decided to become a hero in the first place."

Katsuki took a small step back as a small flash of fear gleamed in his eyes briefly. Izuku was the only one that saw it however he decided to keep quiet about it. Katsuki sat down after scoffing and sending a glare at Izuku. Tamaki however gave Izuku a look of awe while having a slight blush on her cheeks. Izuku noticed however he didn't embarrass her by keeping silent. He did give a gentle smile and wink at her; this caused her blush to deepen. Tamaki did return the smile while the two of them decided to talk while ignoring the teacher. However that came to an end when Katsuki jumped onto his desk and starts a rant about how he was going to be most famous hero ever, even surpassing All Might himself for a second time. Izuku rolls his eyes and was about to start another conversion with Tamaki only for the teacher to stop that before he could say anything "Well, it would seem that both Midoriya and Kotatsu have also decided to apply for U.A as well."

This causes the entire class to freeze with the exceptions of Izuku and Tamaki. The both of them sighed while knowing what was coming. Izuku got himself ready which got Tamaki's attention since his eyes started to glow an emerald green. She smiles slightly before resting her head on her right hand while watching Izuku. Izuku however kept his eyes on Katsuki since he knew just how dangerous the boy could be with is explosion quirk. Izuku remembered the promise he made to Tamaki long ago. Katsuki had managed to snap out of his stupor before turning towards the two other students that were going to apply to U.A along with him. Katsuki launched himself towards Izuku and Tamaki with small explosions in his right hand. Katsuki quickly turns so that his attack will hit Tamaki since he knew she couldn't handle the heat of his quirk before smiling cruelly since he believed Izuku wouldn't be able to protect the girl this time. Katsuki was proven wrong when a sphere of fire surrounds Tamaki and managed to absorb Katsuki's attack without any damage being caused. This also made sure no one outside of the sphere was harmed. Katsuki looks at the sphere in shock before turning when he heard a chair being moved. Katsuki gained a look of fear that everyone saw. They all turned to see what he was looking at causing them all to gain fearful looks with the sole exception being Tamaki who smiles softly at Izuku since she knew why he was giving Katsuki a frightening glare. Izuku stood up to his full height of six feet before looking down at Katsuki who was only 5'9" at the moment. Izuku took two steps towards Katsuki in order to be in between him and Tamaki. Izuku kept his back to Tamaki while also keeping his eyes on Katsuki "I don't like the fact that you decided to harm Tamaki instead of taking me out first. You of all people should know better than most what happens when you go after someone I care about before you go after me, after all that makes me angry. You remember what happens when I'm angry don't you, Katsuki?"

This causes the boy in question to take a couple of steps back with a look of slight fear on his face "Yes, I remember and I don't want you to do that to me again, please! I'm sorry Deku, I won't do it again just don't get angry."

Izuku nods before moving himself and Tamaki out of the door way "I'll let this slip this time, only if you leave the school right now."

Katsuki shot out of the room faster than anyone had ever seen him move before. Izuku turns to the girl behind him "Are you alright?"

She looks up at him and smiles "I'm fine thanks to you. I honestly thought that I was about to be thrown into a wall or through the door by his explosion."

Izuku smiles back at her and nods "I won't let anyone harm you when I can stop it, now let's get to our training ground since I want to get one last training secession in before I need to make a new training schedule for the both of us. These next ten months are going to be hard on the both of us. However we'll have more specialized training for our quirks while also making sure that we can get some sparing in every now and then. Other than that we'll be training on our own so that we can get more progress with our quirks before the entrance exam for U.A that is unless you want to go do something else today?"

Tamaki looks thoughtful before nodding her head "Yeah I would like to go to a nearby beach that I've read about, this beach is supposedly covered in mounds of trash. I was hoping that we could check it out, and if the rumors are true that maybe we could clear it while also getting some personal training in for our quirks. Would that work for you?"

Izuku nods "Sure, however I'll need to make sure that I add in the time we can clean the beach into our training schedule while also making sure that we have more than enough time to get some training in for our quirks while also getting some sparing in so that we can work on using our quirks in combat against other people."

The girl nods before the both of them walks towards the beach with Izuku following his female companion. It took them about fifteen minutes to get to the beach only for Izuku to look around with wide eyes while Tamaki was in shock by how much trash was piled up on the beach. Izuku shook his head and sighed "This is going to take a long time. Hell it may actually take the full ten months to clean all of this while also getting all of the personalized training we want with our quirks while also making sure we got time to spare with each other. While we need to leave so that I can get started on our new schedule, while I would like to train today that wouldn't be a good idea since we're going to need all of the energy for tomorrow when we start our new training schedule."

Tamaki nods and the both of them decided to walk to Izuku's house since Tamaki is staying the night there with her adoptive father being out of town since this morning. After walking for ten minutes Izuku looks at her "Do we need to swing by your house and get yourself things?"

Tamaki takes off her backpack before looking through it for a few minutes. After she was done she nods her head "Yeah, I don't have everything I need since dad said he's going to be gone for at least two weeks, I only have enough for a week while also making sure that I have some extras just in case I need them."

Izuku nods and walk towards his house only to stop at the house just before his. He turns to his friend "Do you want me to come in and help you or stay out here and wait for you?"

She smiles at him "Please stay out here since I don't want you seeing some of the things I need to pack, after all it's for my female issues after all."

Izuku nods and leans on the concert support holding the gate while Tamaki walks into her house alone. About fifteen minutes later Tamaki comes back out and smiles before the two of them walked into the house that Izuku and his mom lives in. Izuku was telling his mom that Tamaki needs to stay with them for two week since her dad was out of town for that time while Tamaki was taking over his room for the two weeks since neither Izuku nor Inko would allow her to sleep on the couch. After she was finished putting her things in the extra dresser that Izuku kept in his room for her before looking around, her expression gained a frown when she saw that a lot of the hero pictures that use to be on the wall are gone. She didn't know why he would throw them away since Izuku loved heroes. Tamaki walks out of Izukus' room before looking at him "Zuku what happened to about a third of your hero posters and the other merchandise you had?"

Izuku sighed "I threw them out because I got to meet those heroes and after seeing how they acted behind closed doors or with their sidekicks caused me to become disgusted with them. When I got home after those times I took the posters down and threw them away while selling any merchandise I had for that hero or heroine. The ones that are still in my room are the ones I've either never meant or I found nothing wrong with them."

Tamaki nods before smiling at him "Well I can understand that; however you shouldn't get upset with them over being hard on their sidekicks or how they act behind closed doors, I mean they're human after all."

Izuku shakes his head with a sighed "I don't want you to think that I did that for them being human, I know that they're still human just like you and me, however the problem I have with them is how they treat their sidekicks like they're less than dirt. I also don't like how they complain about the civilians while also complaining about how they hated working for the people, if they hadn't spoken like that or treated their sidekicks the way they did then I'd still have my merchandise of them as heroes."

Tamaki nods "I can understand that, now let's sit down and work on a training schedule for the two of us while factoring in cleaning the beach of all the trash on it, we also need to make sure that we get the time to spare with one another. We also have to factor in time to study and rest since the entrance exam isn't just about what we can do with our quirks. We need to rest so that we don't do something that could get us injured in a way that we can't take the exam."

Izuku nods and the two of them sit down on the small concrete wall while he pulls out a note book so that they could come up with a training schedule for the next ten months.