Let the battle begin 

The next couple of days were quiet and without much excitement. His classmates talked with each other and formed a few "cliques", though they didn't discriminate the more introverts of their classmates and tried to make them open up a bit. The same applied to Killua, kids just started talking to him and he showed a more friendly and mischievous side, to his surprise they thought he was the serious kind of guy that doesn't know the meaning of fun, like Tenya, until pink skin (Ashido) pointed out his show on the entrance exam. So yeah, Killua surprisingly became friends with most of his classmates, even though he was strategically avoiding Broccoli boy and Boom Boom Boy (A/N pretty sure you know who I'm referring to), now, why was he avoiding them? You see Broccoli boy reminded him of Gon in more ways than he would like, even though they weren't very similar in personalities they still were similar, and to his dismay, their appearance was even more similar. Actually, the first time he saw him he thought it was actually Gon, he knew better than to have his hopes up but he still did, and he was extremely disappointed when he was reminded that his first and best friend was a whole world away. It was kind of hard for him since he was still getting used to this world and Midoriya was constantly reminding him of someone he had to leave behind. As for boom boom boy, well the only reason he avoided him was his crappy personality, the guy had "arrogant issues" and an ego that had the same size as his butt, it pissed the hell out of Killua, so he avoided him in order to save his life, and with that, I mean in order to avoid assassinating him.

The only guy he himself tried to befriend was the Zuko cosplayer, Todoroki and the reason behind that was because he reminded him a bit of his former self, the one that was his family's puppet. He didn't like seeing someone resembling him, even in the slightest so he decided to make a huge step in his life and be the first to initiate contact. The second day in lunchtime he excused himself from his classmates that he was hanging out with and lock target on Shoto, who was sitting alone, when he came close enough, he asked if the seat was taken in which Shoto replied "it isn't but I prefer to sit alone". Killua simply said "okay" and Shoto thought that he would leave but to his surprise, he ignored his wishes and sat down, therefore a very quiet and a bit uncomfortable lunch occurred and for the past two days the routine continued with the tension slowly fading away, they still ate in silence but it was more comfortable.

Shoto: Why are you insisting on sitting with me? Wouldn't you have more fun with the others?

Killua: I would

Shoto: So?

Killua: So, what?

Shoto: Why are you sitting with me?

Killua: Because I want to, simple as that

Shoto: Do you think you can gain anything by sitting with me?

Killua: Like what?

Shoto: money, fame. Are you here because you think that by getting close to me you can get close to Endeavor? -Killua noted how Shoto's voice was filled with disgust and anger when he mentioned his dad's hero name- If that's what you believe you can stop now.

Killua: It isn't anything like that… In all honesty, I don't really care for those things

Shoto: Then why are you here?

Killua: Dunno.

Shoto: Then leave

Killua: Nope

Shoto: Why?

Killua: Cause I don't want to. -He said as he took a bite from his sandwich, Shoto just left a long sigh but remained in his seat, probably because the cafeteria was filled, but Killua would like to believe that it was because he enjoyed his company- On more important matters, your quirk it's more than just ice, isn't it? -Shoto raised his eyebrow and remained silent- I noticed that you used only your right side to generate ice, meaning that your left side is something completely different, most possible fire since I also took notice of how your food is almost always warm.

Shoto: You're right I can generate fire from my left side… what about you? Is it super-speed?

Killua: Nothing like that.

Shoto: Then?

Killua: I can manipulate electricity

Shoto: same as Kaminari?

Killua: Pretty much, but I'm stronger.

Shoto: And the superspeed?

Killua: Hey now, leave a guy have his secrets. -Shoto stared at him but after a while, he resumed eating, setting at the same time the atmosphere to the same comfortable silence as before-

The rest of the day passed by a blink of an eye and it was finally time for the subject they all have been expecting for. The heroic class.

Elbow Tape (Sero): I hope it isn't a boring lecture this time, I'm in desperate need of action.

Kirishima: I'm with you man, hopefully, we'll get to fight those robots again.

Meanwhile, Killua was listening to all the conversations around him while playing fruit ninja in his phone.

Killua: He's coming. -He whispered but Shoto who was sitting beside him heard him, he simply looked at him with a raised eyebrow-. You'll see.

At that moment a loud booming voice yelled out.

???: I AM COMING THROUGH THE DOOR LIKE A NORMAL PERSON!!! -All the students turned to see the number one hero coming through the door like NOT a normal person, he was wearing his yellow, white, red, and blue costume, hair similar to bunny ears, and his signature beaming smile. –

"Someone needs to tell him that there was nothing normal in his entrance" Thought Killua

Kaminari: It's All Might!!!

Kirishima: He really is a teacher!!!

Tsu: Isn't that the costume from the silver age?

And many more comments were thrown while All Might was walking inside the classroom.

All Might: I teach hero training, it's a subject where you train in different ways to learn the basics of being a hero. You'll take the most units of this subject! Let's get right to it!!! This is what we'll do today. -He said and presented the class with a card that wrote BATTLE- Combat training!!!

Boom Boom boy: Combat training.

Kirishima: Finally, something exciting

All Might: And to go with that are these! -he said and pressed a button that made cases appear through the wall- Costumes made based on your Quirk registrations and requests you sent in before school started. After you change, gather in-ground Beta!

One by one they got up and grabbed their case with their number on it, Killua grabbed his case no. ten while still playing Fruit Ninja. He had forgotten to make a costume request and Shota had to take care of it for him later, so he was kind of curious as to what his costume was like.

He headed to the changing rooms with the rest of his classmates while discussing among themselves and finally separated with the girls.

Kaminari: Isn't this exciting??? Our first heroic class and it's already something really cool.

Sero: Man, I can't wait

Kirishima: Killua what are you doing on your phone?

Killua: Fruit Ninja. -was all he said-

Kaminari: How can you not be excited about what's happening right now?

Killua: Who said I'm not? -He said as he finally put his phone down and started undressing-

Sero: Well, you don't really show it.

Killua: Doesn't mean I'm not… -He said as he removed his shirt, he heard a few gasps and he rolled his eyes- "That's why I wanted to change in the infirmary, but nooo…"

Kirishima: Dude…

Killua: Don't. -He interrupted him before he could even start, everyone then fell on an uncomfortable silence as they started to change-

Killua's costume was simple, it was a dark grey, seemingly black spandex jumpsuit, above he had black shorts that had two blue bolts of lightning on the sides like strips, and a black utility belt, where he put his yo-yos. He also had black gloves where the fingers and palm were blue and his shoes had the same blue as his lightning patterns and white details, while on his shirt he had blue stripes, once again in lightning shape, coming up from his middle finger to his sleeves at both sides leading to a lightning bolt symbol on his chest. (A/N imagine Miles Morales spiderman suit in the movie into the spider-verse, without the mask, and with his shorts, the only difference is Killua has sports shorts and the pattern is a bit different, but it's still inspired by Miles, Also I was thinking Hunter as his hero name, but I'm open in suggestions. As for his assigned seat, I replaced the sugar rush dude with Killua, so his seat that was no. ten is now Killua's)

Killua was the first to get out with Shoto following him seconds later. They were quiet as more of their classmates came out until Killua spoke.

Killua: You reminded me before I met my best friend, that's why I sat with you in the beginning.

Shoto: I figured as much… these scars…

Killua: Maybe another time Shoto, I honestly don't like talking about it.

Shoto: I understand… thanks

Killua: No problem.

As all their classmates came out, he saw All Might's eyes linger on Midoriya for a while and trying to stifle his laughter he turned around to look at him, and the moment he saw him he understood. Midoriya's costume was an All Might knock-off, honestly, it was hilarious especially since he knew the story with these two.

All might: They say the clothes make the man, young men, and ladies. -He said once he calmed down enough- Be fully aware, from now on… YOU ARE HEROES!!! That's great everyone, you all look cool. Now it's time for combat training.

Ida: Sensei! This is a battle center from the entrance exam, so will we be conducting urban battles again? -As always Tenya jumped to conclusions without waiting for the teacher's explanation-

All Might: No, we're going to move ahead two steps! Most of the time, fighting villains takes place outside, but if you look at the total numbers, atrocious villains appear indoors at a higher rate. Imprisonment, house arrest, backroom deals… in this society filled with heroes…truly intelligent villains hide in the shadows! For this class, you'll be split into villains and heroes and fight two on two indoor battles.

Tsu: Without basic training? -Asked the frog girl-

All Might: This is a real battle to understand those basics! However, the key this time is that there's no robot you can just beat up.

Ponytail girl (Yaoyorozu): In that case, how will wins and losses be determined?

Boom Boom Boy: Can we just beat them up anyway?

Zero gravity: Will the punishment be expulsion like with Mr. Aizawa?

Ida: How shall we be split up?

Flashy guy: Isn't this cape crazy? -and many more questions were thrown at All Might who had cold sweat running down his face, this continued for few more seconds until a loud whistle made it to everyone's ears. -

Killua: Will you let him explain instead of asking questions? And yes, the cape is very flashy… -All might send a small nod of appreciation to Killua then he took out a small handbook-

"A script?" Every single one of them thought.

All might: Now listen here. The situation is that the villains have hidden a nuclear weapon somewhere in their hideout. The heroes are trying to dispose of that. The heroes need to catch the villains or get the nuclear weapon back in the allotted time. The villains need to protect the weapon the whole time or catch the heroes. Teams and opponents will be determined by drawing lots! -he said as he took a box out of nowhere-

Ida: They're being decided so haphazardly?

Broccoli boy: Pros often have to create makeshift teams with heroes from other agencies, so probably that's why.

Ida: I see… the discernment to look ahead… Please excuse my rudeness.

All Might: It's fine, now let's begin.

A few minutes later

Killua looked at his letter then looked around a bit until he found his teammate.

Killua: Momo you have the letter C right? Looks like we're together. -He told her as he got closer and taking her off guard as he used her first name-

Yaoyorozu: Indeed, we are. I'm looking forward to our partnership.

Killua: I do too, though I have to ask… your costume is it because of your quirk? -As he asked her that, she blushed-

Yaoyorozu: Once again you're correct, you see my quirk allows me to create stuff from my body mass, only restriction, I have to know their composition. Is it too revealing?

Killua: A little bit yeah, but you don't really have a choice.

Yaoyorozu: I know, though I've been stared a lot…

Killua: Can you blame us? If that helps though, you're not the only one.

Yaoyorozu: It really doesn't. -Killua just shrugged at that-

All Might: The first teams to fight will be… -All Might said while he put his hands into two boxes and tried to pull the balls for the villain and hero teams- these guys! -then he presented to them a black ball with the letter B as villains and a white ball with the letter A as the heroes- Team A will be the heroes while team B will be the villains. Everyone else, head toward the monitor room.

Killua: This won't end well. -he said to Momo as he walked towards the monitor room-

Yaoyorozu: You think so?

Killua: It's obvious that those two have a history and not a good one at that.

Shoto: Who do you think will win? -Shoto joined in the conversation surprising Momo-

Killua: I really can't tell… While the explosion guy has better control over his quirk, he is hotheaded and he most likely will rush in battle underestimating his opponents and not counting on his teammate, while broccoli guy can't control his quirk very well, I have heard him mumble and seen him taking notes about quirks, he has probably analyzed his enemy and has vast knowledge at his side. He may be lacking at the quirk department but the knowledge he possesses is greater than a quirk. Ass for the other two… Tenya will take it seriously and will try to keep his focus, but he will have to count on his teammate as he's more of a support guy, as for Ochaco, she may not take it as seriously as she should. -After he finished sharing his thoughts silence occurred, he took his eyes off his phone screen as he started playing Fruit Ninja once again only to see that all his classmates (Except team A & D) and All Might were looking at him with wide-open eyes- What?

Yaoyorozu: It's just… you surprised us. I would never have thought you were the analyzing and strategic type.

Kaminari: I honestly thought that you didn't even pay attention to anyone…

Killua: Geez thanks. -All Might just diverted his eyes and looked on the floor, having a flashback of their conversation about his past. His fist became white from the pressure, something Killua took notice of- Sir, shouldn't you start the match? -he asked him-

All Might: Right. Now, let's start the indoor two-to-two combat training with Team A and Team D! -he said on the microphone, then he turned to the students at his side and told them- Okay, everyone, you all should watch very carefully and think as well.

They saw as Midoriya and Ochaco got in the building through a window and walk around. "Their stealth needs improvement" Killua thought. He noticed as Bakugo made his move and jumped from where he was hiding from and target Midoriya who jumped aside taking Ochaco with him as well.

Kyoka: A surprise attack from the beginning?

Kirishima: Bakugo, that's cheating! A surprise attack isn't manly at all!!

Killua: You forgot he is playing the villain, besides a surprise attack is the best strategy for both sides. While the villains have the upper hand because they know the building's layout better the heroes can make a sneak attack if they are stealthy enough. Also, this has nothing to do with manliness, you can't expect a fair fight in the real world. Both villains, as well as heroes, play dirty and sneak attacks are most likely the biggest element both sides use.

Kirishima: Well, when you put it that way.

They kept watching as they went at each other and as Killua predicted Midoriya had his knowledge against Bakugo and countered attack. Killua just read their lips since there was no audio and figured out, they had an emotional conversation, well, emotional from Midoriya's side, Bakugo just went ahead and told him he hated him.

Midoriya told Ochaco to leave and thus they separated from each other. They saw as they fought and after a while, Midoriya had to run in order to strategize, while Ochaco found Tenya who was making a weird presentation of a villain that caused her to giggle and be found out.

Shoto: She just announced her position.

Yaoyorozu: As Killua said, Ida is taking it too seriously while Uraraka isn't taking it seriously enough.

Hagakure: Kind of hard to take it seriously with the way Ida is acting…

Yaoyorozu: while I agree that Ida's acting is hilarious, there are dozen of villains out there that resemble his act, the difference is that they are NOT acting.

All Might: Remember never underestimate your enemy, no matter how he looks or acts, underestimating him can lead to a fatal mistake.

They watched as Bakugo took off his gauntlet.

All might: Young Bakugo, stop! Are you trying to kill him??? -Bakugo ignored All Might's words and got ready to fire, while All might got ready to run in and stopped him until a hand on his shoulder stopped him. He turned around to see Killua-

Killua: Don't worry. -He whispered to him and pointed on the screen; All Might immediately understand what he meant when he told him not to worry. –

The explosion happened and as expected Bakugo fired at him in a way as not to injure him severely, just a few scraps. They saw as Bakugo took a crazy grimace and talked down on Midoriya.

All Might: Young Bakugo, the next time you use that, I'll stop the fight, and your team will lose. An attack like that is inviting the destruction of the stronghold you should be protecting. That is a foolish plan for both heroes and villains! You will lose a lot of points because of it! Furthermore, you put your classmate in fatal danger, if you want to have a chance at winning hold yourself together.

After the warning, they continued fighting and at some point, Midoriya sent Bakugo's explosion upwards toward the bomb and helping Ochaco to touch the bomb resulting in their victory. Midoriya was sent to the nurse's office once more because of the multiple damages he received, while the others went back to the monitoring room to watch the upcoming fights. The MVP for this fight was announced to be Ida, after some questioning Momo gave a very in-depth speech explaining the reasons behind it. They continued watching fights most of them were uninteresting in comparison to the first one. Shoto's fight caused a lot of jaws to drop as he demonstrated a huge level of power. Then it was finally his turn Team G as the heroes (Denki Kaminari & Kyoka Jiro) VS Team C as the villains (Killua Zoldyck & Yaoyorozu Momo)

Killua: Now that will be interesting… -he said once they got in the building-

Yaoyorozu: How come?

Killua: You see Denki and I have the same quirk; the difference is mine can be considered stronger.

Yaoyorozu: lightning Vs lightning…

Killua: Hey, what's your limit in your creations?

Yaoyorozu: The simplest and the smallest they are the more I can create.

Killua: Makes sense… can you create something in order to put this whole room in lockdown?

Yaoyorozu: Sure thing, but we can't just hide here…

Killua: We won't, while it's true that I'm going to need you to stay here and protect the bomb I'll go out and deal with those two.

Yaoyorozu: I can't just let you go…

Killua: Don't worry, we're gonna win this

After a few minutes, All Might started the fight and the heroes rushed inside in order to find the bomb.

Heroes POV

When All Might gave the signal Kyoka put her jack in the wall in order to pinpoint the villains, however, she could find only one of the two, most possible Yaoyorozu since the sound matched those of hills. She warned her teammate that there was no trace of Killua and where the bomb was supposed to be. They both run inside with their guard up and occasionally stopping in order for Kyoka to try and find Killua with no success. What the heroes were unaware as well as everyone in the monitoring room, was that Killua was above the heroes the entire time. He finally dropped behind them with no sound and decided to have a bit of fun. He stayed behind them and saw as they tried to find him. Everyone in the monitoring room watched as Killua simply stood there doing nothing until he finally moved. He was so fast that they thought he teleported somehow and was Infront of Kyoka, he used lightning palm on her and she was out within seconds. Denki tried to do the same as him, but Killua had two other abilities that were stronger than Denki's, 1. Lightning absorption and 2. Because of his assassin training and later his nen training lightning immunity. Therefore, he absorbed Denki's attack and making him take a weird grimace of both surprise and terror, then he went behind him and chopped him in the back of his head winning his fight. No one really realized that he used Electricity as well, and were very confused with his quirk, at one point they decided it was just his speed, that's why they were later surprised when they saw him using lightning. For now, only his teachers Shoto, who he started considering his closest friend, and Momo the class's beauty knew the truth behind his quirk.