[Note: I based this story/character on Denji from Chainsaw Man. And for those who already have this story, you'll see that the High-End Nomus and the ending are different; it's because I didn't like what was there before. I hope you understand. Thank you.]

You were a U.A. student hated by everyone. Why? Because of your Quirk: Lifesaw.

A strange, weak, and useless power. It allowed you to transform one of your hands into a small chainsaw by pulling the cord attached to your sternum, right in the middle of your chest. However, the blade wasn't very long, nor were the blades sharp enough to defend yourself properly. While your classmates grew stronger and mastered their Quirks, you lagged behind, like a shadow barely worthy of attention.

Every day was the same. Hateful, disgusted, and judgmental stares followed you wherever you went. Hurtful words echoed behind you, not only from your classmates in Class 1-A, but also from the other students, Principal Nezu, and even All Might. Still, you endured all the scorn. You felt like an embarrassment to U.A., a stain on the most prestigious hero school in the world.

One day, during a mission in Kamino, a group of High-End Nomu attacked the city. You and your classmates—Izuku, Bakugo, Todoroki, Uraraka, Iida, Mina, Tokoyami, Kaminari, Momo, Jiro, Sero, Kirishima, Tsuyu, Shoji, Aoyama, Hagakure, Koda, Ojiro, Sato, and Mineta—were sent to stop them. Without thinking, you charged forward. It was a mistake. The High-End Nomu were too powerful; every blow knocked you down, every impact brought blood and pain. Your classmates just watched, motionless. No one helped you.

When you fell to the ground, on the brink of death, you felt something break inside you. Your veins burned, excruciating pain coursed through your body, your head felt like it was about to explode. Instinctively, you pulled at the rope on your chest.

Then it happened.

A metallic roar erupted from you. Your head transformed into a demonic mechanical form with long, jagged fangs and a chainsaw handle at the back. Large chainsaws emerged from your forehead and arms. Your body felt stronger, your mind more savage. You attacked mercilessly, destroying the High-End Nomus in seconds. Each cut was a scream of pent-up rage, a brutal release.

When it was all over, your hands trembled. You felt the blood slowly trickle from you. You looked at your companions; they were all staring at you, terrified. But this time, you didn't care.

Days passed, and you discovered that your transformation caused you to lose some blood, so you knew you had to use it wisely to have enough blood to transform. Also, if you drank someone's blood, you would quickly regenerate a part of your body, regain blood, strengthen your Quirk, and make your chainsaws work. But you also knew that everyone at U.A. now feared you, and that was kind of fun, though it wasn't something you dwelled on much because you were stronger than before.

Two months later, you were in the dormitory common room, sharpening and polishing the chainsaw on your right arm. Even though you felt your classmates' stares, you didn't care and were focused on your work.