"Hello everyone. My name is Midoriya Izuku, and I'm a villain".

The reaction was instantaneous. The entire class except the two who already knew him immediately tensed up as if they were preparing for a fight. Kacchan wasn't really affected by the statement having already known all this but he was still annoyed that "Deku" ,as he liked to call him but couldn't anymore, was wasting time messing with the extras.

Izuki on the other hand while unaware that Izuku was going to be teaching here was shocked at first but that shock slowly gave way to anger because not only did him being here mean she couldn't build up good relations with her class before they learned her connections to an infamous villain but more importantly it also meant he had been captured. Something hadn't been sure was possible. Izuki, being too focused on thinking of what to say in her not too distant conversation with Izuku, didn't notice a certain girl with pink skin and horns rapidly looking between the two siblings slowly putting the pieces together.

Izuku, the cause of the reaction, was relishing in the sight of everyone's faces at his declaration. "They all immediately prepared for a fight, which is a good instinct, but had they thought it through then they would realize I am obviously not here to fight. Just something more to teach them I guess." thought Izuku. He then turned to look at his sister and was greeted with a face that promised pain. "Oh yeah, decided not to tell her. May have been a mistake."

Izuku having said enough of an introduction turned and looked at Aizawa. "Also, Aizawa, I am an assistant teacher not a teacher's assistant. My job is to help them learn, not to help you teach." Izuku didn't actually care about being called a T.A. he just wanted to make both Aizawa and the class aware the kind of dynamic he would be instigating in the classroom, and what doesn't convey that message clearer than sass.

Aizawa gave a sigh to act as a sign of understanding. He had far too much experience with the menace to know that trying to talk back would just make things escalate and he just didn't have the time nor the caffeine in his system to deal with him. After a brief period of silence following the two's interaction Aizawa addressed the class. "All of you take a gym uniform and meet me on the field." The students just stared at either Aizawa for ignoring the literal villain in the room or Izuku. "Now" he added with a bit of malice to get them moving. Realizing they had orders sent the student into action. Each got up grabbed a uniform with their name on it and made their way to the field. Aizawa about to start the journey himself stopped when he saw Izuku make his way from the back of the class towards the door. "You aren't allowed." he said.

"Why not?" Izuku said back, not very surprised about things turning out this way but if he was to be left out then Aizawa had to work for it.

"I would have allowed it but due to your introduction I can't have your presence stop the students from doing their best. You have no room to complain considering I have read your curriculum plan and I know you are doing a student evaluation of your own." replied Aizawa hoping the brat would leave it at that. Of course, he was wrong.

"If the hero students can't do their best with a villain watching them then they have no hope and your gonna expel them. You are just looking for a way to get rid of me while you teach." said Izuku with no real anger but rather more of a teasing manner that says "you aren't as sly as you think".

"Just stay here problem child." he said before making his way to the field happy he didn't notice any footsteps following him.

In the girls locker room Izuki was off to the side thinking. Unlike her brother she almost never mumbled. The rest of the girls were conversing about the mysterious villain teacher.

"Why would U.A. hire a villain and what could they possibly teach us. Especially a villain that looks to be our age." said the floating clothing that had already introduced herself to the entire locker room as Hagakure Tooru.

"He is most likely here as a form of rehabilitation considering how young he looks. He most likely ended up in a bad situation at no fault of his own and turned to a life of petty crime. As for what he can teach us they probably want to use him to gage our reactions to him rather than have him pass on any personal knowledge." This comment came from one Yaoyorozu Momo. A relatively tall girl with black hair in a ponytail.

Izuki smiled at that comment knowing it was completely wrong. While she herself didn't know how he ended up a teacher. She knows that he will end up teaching some of the most important lessons they are gonna learn on their path to being heros.

Having finished changing and seeing an opening. Mina decided to make her move. Ever the curious one she just had to know what was going on with what she guessed were twins, based on how similar their names were. No way they weren't at least siblings. She slowly made her way to the almost changed Izuki to get some answers. "So, you have a brother?" Unsure how sensitive the topic of him being a villain is she decided to start with acknowledging his existence. She considered it sensitive enough to not be offending but specific enough to tell the other girl what her intentions are.

Izuki, remembering that the pink girl in front of her was the only one that ever got her name. "I have one now, but I make no guarantee about tomorrow." she said still very focused on thinking of the proper punishment.

Before Mina could question further Izuki finished changing, as well as all the other girls. Izuki noticing this used it as an out from the conversation and made her way to the field to meet up with Aizawa-sensei and her brother. Only for her brother to be nowhere in sight.

After a few minutes everyone had arrived at the field so Aizawa started telling the student what they are doing today. "You will all be doing quirk assessment test."

"A quirk assessment test?!" was the classes collective response. This new development having put thoughts of the green haired villain T.A. out of their mind for now.

One particularly brave girl name Uraraka Ochako decided to voice her questions. "What about the entrance ceremony? The orientation?"

"If you're going to become a hero, you don't have time for such leisurely activities. U.A's selling point is how unrestricted its school traditions are. That's also how the teachers run their classes. We are already running late due so we'll get started as soon as possible. I am going to have you all do the physical fitness test you have done since junior high, only this time you can use your quirk however you want to get a better score. Be creative and you might just earn your place." was Aizawa's response.

"What do you mean by that" asked the boy with electric blond hair name Kaminari Denki.

"Oh, I forgot. Anyone I judge to have no potential will be expelled. Go beyond. Plus Ultra. Overcome it with all you've got." was how Aizawa answered the question.

This statement elicited even more of a reaction than Izuku's introduction. The crowd of students immediately took in the implication of these words. If they failed, they dreams were done for. The nervousness in the students gave way to determination and each of them were ready to give it their all.

Before any of them could start to question his teaching methods Aizawa began the first test, the 50 meter race.

The only student of note up until this point was Iida Tenya with his score 3.04 seconds. But now it was Izuki's turn and when it came to speed, very few had her beat. Izuki unfortunately was paired off with Kacchan and would have to deal with his explosives. Luckily she had enough experience with them that they didn't even startle her but the smoke he produces would be annoying. She took her place at the starting line. Leaned forward and began preparing to use her quirk. As soon as the robot with a childish voice said start she applied her telekinesis her shoes and shot off like a rocket. Normally she wouldn't be able to balance herself and control her movements at this speed but because she just needed to move a small distance in a straight line without obstacles she didn't need to worry about control too much. To the onlookers it probably looked like she disappeared. She zoomed pass the robot finishing with the new class best of 2.45 seconds.

The next test was grip strength. Izuki was lucky the testing apparatus was within her size restraints. However she was unlucky in that it didn't weigh much. Her quirk didn't care about mass or weight, just about volume. From there she could accelerate objects to ridiculous speeds. The thing is, force is dictated by both mass and acceleration so the higher the base mass the more force she could put behind something. She still scored 113 kilograms of force which put her high in the rankings but its not her full potential.

The third test was the standing long jump. No need for speed so she just gently floated herself to the other side.

Repeated side step was an interesting test for her to use her quirk. She could very easily send herself side to side very quickly but the effects of changing directions at such high speeds is something she is aware of so she held back on this one. Fortunately not many of her classmates could figure out creative uses for their quirks to help with this test so she still scored second. Losing to the creepy purple midget that kept staring at her and the other girls in a very not family friendly manner.

Test five was the ball throw and it was all about power output. Kachan excelled in this field earning a score of 705.2 meters. A good score but because of the softballs decent weight Izuki could beat it. She took the ball and immediately had it start moving in a vertical circle at speeds that made it look like a ring. Once she let it loose it flew. 1.5 kilometers to be exact. Earning her second, losing out to "Infinity girl". Izuki's current mental nickname for her.

The six test was a distance run. Izuki did well in this event, using her quirk to float her around the track but the mental strain of keeping her shoes afloat and maintaining her balance eventually forced her out.

The seventh test was seated toe touches. She was naturally very flexible so she didn't even use her quirk to help with this one.

The eighth and final test was sit ups. Izuki achieved a great score by placing her shoes on her hands and through using her quirk to move her shoes back and forth as well as her trained physique she was able to accumulate the highest score.

Now that the tests were over Aizawa looked over all his students. They had a lot to learn but they showed potential. He addressed the class, most of which were out of breath. "Here are the rankings." Izuki came in second with a score only a little lower than Momo in first. He began to make his way back to the classroom.

"Wait, did any of us get expelled?" asked the small purple kid name Mineta Minoru having come in last place and fearing the worst.

"Oh yeah, that, just call it a logical ruse." Aizawa replied but before he could continue making his way back to the classroom to get some sleep he heard a comment he couldn't go without correcting, for their own safety.

Engine guy or Iida Tenya said "A lie in order to get us to try our best. That would explain the T.A. in the classroom. Him being here was meant to throw us off to see how we react. He most likely was just a second or third year that was used to trip us up." Many students agreed with the conclusion because it was more believable than what they have been lead to believe.

Aizawa turned to the class. "No, he's really a villain and one of your teachers. He may look innocent and sweet but don't underestimate him. He can be very dangerous when he wants to be. That is all. Change into your uniforms, get your stuff from the classroom, and leave. Your done for the day."