[Author's Note: My dumbass forgot to make a hero costume. I'll put one in this chapter and the bio later.]
Hero Costume: Black Jeans, White T-Shirt, Leather Jacket Cape(?), Black Shoes
Another day at U.A. But this time, Class 1-A truly starts the hero course. However, before they could begin, the Class had to go through the standard school day; Literature, Math (which y/n hated cause it was her worst subject), Lunch, etc. y/n even managed to get the phone numbers from her classmates, Mezo Shoji and Momo Yaoyorozu. y/n also saw that Tokoyami tried to approach her, but was met with hesitation. In the last period, it was time for hero training.
All Might burst through the door. He strutted towards the desk. He then held up a card saying "BATTLE" which meant the class would be doing battle training for their first day of the hero course.
All Might: But first, you'll need these!
All Might click a remote at the leftmost wall. And from it were cases with the numbers 1 through 21. Each number corresponds to the seat number of a different student.
All Might: After you finish changing, meet me at Ground Beta!
One after another, the students grabbed their cases and went to the changing rooms.
After everyone was finished changing, they walked through a dark corridor to Ground Beta. Upon exiting, the light of the sun revealed their costumes. Y/n didn't need light to see due to her cat-like eyes granting her Nightvision, though it was appreciated. The first one she looked for was Tokoyami. Y/n roamed through the crowd searching until she accidentally bumped into him. While y/n was looking for Tokoyami, it seemed Tokoyami was doing the same. Y/n and Tokoyami took in the sight of each other's hero costume before finally being able to strike up a conversation. Or rather, Dark Shadow was able to.
Dark Shadow: Hey, y/n. Lookin' great!
Y/n: Oh, um... Thanks...
Unfortunately for y/n, Righty couldn't talk so she couldn't use them as a means to communicate. Fortunately for the both of them, All Might spoke up, cutting their conversation short and signaling that they were to begin combat training. A suit of armor with exhaust pipes raised its hand from it spoke Iida's voice.
Iida: Sir! This appears to be the battle zone from the entrance exam. Will we be doing urban battles again?
All Might: Not quite.
All Might then explained how instead the class would be doing 2-on-2 indoor battles. In this exercise, each student would be sorted into pairs and then put into one of two teams: Heroes and Villains. The villains must defend a bomb inside the building for 5 minutes while the heroes have to capture either the villains or their bomb. As All Might finished explaining, he pointed a finger at y/n.
All Might: And Young Belladonna. I've been given a rundown on your powers. They have been deemed far too dangerous to use against your fellow classmen. So instead, you will use them against me.
The class gasped in shock. Admittedly, even y/n was a little shocked. All Might knew of her powers?! How much else did he know? Y/n decided it was best to leave these questions for later. Perhaps Aizawa could give her an answer. Y/n shoved her thoughts to the back of her head and agreed to All Might's terms.
Later, All Might enters the building, leaving y/n outside and the rest of the class in a room full of cameras to watch the fight. Y/n reviewed the floorplan of the building she was given to from All Might. The building was full of winding corridors except for the 4th floor which was a wide open area safe for some pillars made to hold up the roof. Y/n sighed, stuffed the plans into her pocket, and entered the building. She ran into the building, and climbed up the steps, formulating a plan to beat the Number 1 hero. It was most likely he was guarding the bomb on the top floor. It seemed like a waste of energy to try to find an opponent that was trying to find you. However, this also provided another challenge for y/n. How could she get to the weapon without getting into a confrontation with All Might? The answer: she couldn't. So, y/n might as well bite the bullet.
Y/n walked up to the door that led up to the room on the 4th floor and opened it. As y/n walked in, she made eye contact with All Might. It seemed her hypothesis was right. Y/n closed the door behind her.
Y/n: I already know what you're going to say, and yes, this is my plan. There's no way I can get here without fighting. So let's do this.
As y/n finished, she rolled her shoulders and cracked her knuckles. Y/n charged at All Might, fisted balled up, and leaped at the Number 1 hero. Y/n punched, but All Might blocked and dodged the attacks, until he grabbed y/n's left hand and flung her to the side. Y/n tumbled before getting back on her feet and ran right back at the symbol of peace. All Might turned to face her and readied himself for another pounce, instead, y/n side-stepped. All Might may have size and strength, but y/n was confident in her agility. At the very least, y/n could confuse her opponent. Which ended up working. As All Might struggled to keep track of the dark blur that jumped around his field of vision, the girl jumped once more planning to strike All Might in the back of the head. But before she could attack, All Might vanished. Y/n landed and looked around before a voice spoke from behind.
All Might: An admirable strategy, I will admit. But still not enough.
Y/n turned around just in time to see a fist near her body. She braced her left arm over Righty to block the attack. As it landed, y/n could feel her bones break and her ribs collapse on themselves as All Might yelled out.
All Might:「SMASH!!!」
The force shot y/n back into the door, taking off its hinges, not even slowing her down. She bounced off the floor, then once more, rolled back, and slammed back first into the wall. Y/n's eyes fluttered open, her vision blurry. She felt her head bleeding, her skull felt fractured, and her ears rang out. Y/n looked down to see Righty still intact but her left arm was bloody and the bones were broken. Still, through all the pain, y/n began smiling. A low giggle could even be heard.
Y/n: He was holding back, but still...
Y/n staggered up. The ringing was getting quieter, her vision started returning to normal.
Y/n: ...damn. What a punch. If I was a normal person, I would have been sent to a hospital, or maybe even dead.
The blood on her body evaporated at a rapid pace. She grabbed her broken arm with Righty by the bicep. The fingers on her left hand wiggled independently before opening and closing into a fist.
Y/n: Still, what incredible power.
Y/n: 'So this is the power of All Might! This the power of One For All!'
Y/n rushed at All Might, a manic smile on her face. She jumped up at All Might as if to attack again, but he threw the first punch. Y/n dodged over it midair and turned into her feline form, landing on top of All Might's head and jumping off towards the bomb. Y/n transformed back to her human form and touched the bomb, ending the match.
