My hero Academia fanfiction: Duet

Title: A Symphony of Selves: Duet's Awakening Part One Kai, nicknamed Kai-Kai due to her two identical heads and four arms, had always been special. Born with a quirk entitled 'Duet,' not only did she have a unique physical appearance, but she also had the ability to create duplicates of herself via mitosis, assassinating herself with a collective of identical individuals who shared a single hive mind. Five bodies, including herself, would be her known limit - each new duplicate draining her stamina. Yet, despite the challenges and odd stares, Kai was determined to prove that she was more than just a genetic anomaly with bizarre abilities. As such, Kai considered it a blessing when she received an acceptance letter from the prestigious UA High. Tomorrow marked the first day of her high school and also first day at UA. As she tossed and turned in her bed, her world was ridden with thoughts of, 'What if's?' and 'Can I really do it's? With a reassuring squeeze of her four hands, she would close her two sets of eyes, psyching herself to face what comes her way. A thought of him made her heart flutter - the boy she had developed strong feelings for, whom she had admired from a distance, who happened to be in the same class. Unbeknownst to her, destiny would intertwine their lives closer than ever before. A couple of weeks into school, Kai found her heart pounding when their homeroom teacher, Aizawa, announced the class pairs for their first mission. Staring at the board, her four eyes roved the letters - what she reads contained the promise of her biggest test yet. Paired up with the boy who held her affections. Part Two The mission was going well, by and large. They'd managed to infiltrate the target building, retrieved the objective, and were just about to exit when the ground shook violently beneath them. The building was collapsing! Somewhere amidst the calamity and chaos, her partner was trapped. A swarm of rising dread threatened to suffocate Kai. Her heart pounded in sync with her four heads, a bizarre symphony as the cries and rubble echoed around the precarious environment. However, determination erased fear and prompted action. Time was running out, and it was up to her to save him. Consuming a good deal of her stamina, Kai began her process of mitosis - one, two, three, four bodies sprang into existence beside the original. Each new form blurred their collective consciousness slightly, but she was truly aware that her strength ebbed away with each duplication. Now, standing as five, she stared at the decaying structure, a grim determination etched across her faces. She knew what she had to do. With one last push, she urged another duplication - going beyond her known limit. There was pain, weakness, but also a new figure standing beside her. Six. Kai had become six. With a nod, they moved into action, bursting into the building. Fearlessly, her bodies worked harmoniously, each one knowing the other's movements and thoughts, allowing them to navigate the perilous terrain efficiently. It was a race against time, and they had no room for errors. Just as the last stone was about to fall, Kai's bodies teleported back into view, the boy carried safely in their arms. Wearily, she stood as one again, exhaustion threatening to topple her. But she smiled. Victory. They had saved him. She had saved him. Pushed beyond her limits and discovered a strength she hadn't known existed within her. As he opened his eyes, the look of astonishment morphed into a warm smile that left Kumiko's heart thudding against her chest. "Well done, Kai," he said, voice trembling. Kai couldn't contain her beaming smile, the joy overpowering the weariness in her bones. Yes, she had made it, they had made it. She had stepped over her limits. She was truly a hero of her own story, ready to take on whatever may come next. As long as he was by her side.