[Note: In this story, I based this story on Nazuna Nanakusa, including her outfit, which is your hero costume. Besides, you're a girl.]

Your name is Nazuna Nanakusa and since you entered U.A., you were hated by everyone, and it was understandable since you always carried an umbrella to protect yourself from the sun, always tried to stay in the shade, and almost never spoke to anyone. Whenever someone tried to talk to you or wanted to know about your quirk, you never gave a clear answer, which only increased the contempt they felt toward you. Your classmates, the other students, the teachers, Principal Nezu, and even All Might had all developed that same view of you. Even though you felt alone and hurt by their hatred, you preferred to keep things that way because your secret had to remain hidden: your quirk made you a vampire. You didn't know if anyone would be able to accept it or if they would just see you as a strange and dangerous monster. So you decided to hide behind that aloof facade, enduring the rejection. However, all that was about to come crashing down.

One night, on a routine patrol, the entire Class 1-A was present. Iida, Midoriya, Bakugo, Todoroki, Uraraka, Jiro, Kirishima, Mina, Tsuyu, Tokoyami, Denki, Momo, Ojiro, Sato, Sero, Koda, Shoji, Hagakure, Aoyama and Mineta. Everything seemed to be going smoothly until a group of villains tried to rob a bank using their Quirks. Immediately, everyone sprang into action. The battle was fierce, full of explosions, screams, and coordination, but they eventually managed to defeat them and secure the area. It was at that moment that they realized you weren't among them.

At first, they thought you had fallen behind or were injured, but they soon noticed your complete absence. Worry and suspicion made them quickly search for you. It was then that someone looked up and pointed toward a nearby tall building. At the top, under the dim moonlight, a figure stood. They ran, hurried up to the roof, and there they found you.

You were wearing your hero outfit. A short black top with an opening at the chest, revealing your abdomen, accompanied by a long black jacket with a wide hood and loose sleeves that almost covered your hands. Underneath, black shorts with a belt, and on your legs, long stockings that reached your thighs, completing the dark and provocative look. Your entire outfit radiated a nocturnal and mysterious air, befitting someone who belonged more in the shadows than in the light of day.

In your hand, you held a bag of blood, and when you looked up, your fangs were exposed. Without hesitation, you began to drink directly from the bag, the blood trickling from your mouth as Class 1-A watched with wide eyes and expressions of pure amazement. No one said anything at first, too shocked by the scene. What were you really? That was the question everyone asked themselves at the same time as your fangs gleamed in the moonlight and your secret was finally exposed.