Immortal BNHA

1. A man or a mouse

(The above song is so Amy)

Amy sat quietly, glancing at her watch before sliding a magazine in and out of her M-16A4, equipped with an M203 under-barrel grenade launcher and a suppressor. Her hands moved with the practiced precision of someone who had done this countless times. She brought the rifle to her shoulder, peering through the AN/PAS-13D thermal scope, scanning the docks below. The area was quiet, but not for long. A truck rolled in, and her heart rate steadied. The operation was about to begin.

Moving with silent grace, she descended from her perch, walking alongside the rows of shipping containers, her combat gear blending seamlessly into the surroundings. The thugs waiting by the truck had no idea they were about to meet their end. Amy moved like a shadow, silent and deadly, her years of training evident in every step.

Her finger squeezed the trigger in controlled bursts. Three-round bursts dropped the criminals before they could react. Amy changed her position quickly, finding new concealment behind another container. She knew the Department of Defense had been tracking these human traffickers for years. This was the moment to strike—now or never.

Unbeknownst to her, a hero dressed in black, with shaggy hair and a tired expression, had been watching. Shota Aizawa, known as Eraser Head, hadn’t been expecting this. He’d come to investigate a rumor of a criminal gathering but instead found someone who appeared to be a highly trained vigilante. Her street clothes didn’t fool him—her gear and precision were far beyond that of any civilian. Initially, he assumed she was some rogue vigilante with military-grade equipment.

Eraser Head decided to intervene. As he approached, the 'vigilante' noticed him and immediately moved to neutralize him, mistaking him for a threat. But before she could act, the scuffle drew the attention of the remaining criminals, and gunfire erupted around them.

Aizawa was yanked to the ground as Amy pulled him into cover. He realized with a start that this "vigilante" was barely older than his own students—a girl, in her late teens, maybe younger. She reloaded swiftly and gave him a sharp look.

"Stay back," she ordered, raising her rifle and taking down another group of traffickers with quick, precise shots. Aizawa, shocked at her skills and her age, barely had time to respond before she turned to him again. "Are you a hero?"

"You're interfering with—" Aizawa started, but she cut him off.

"Negative. Either help or stay out of the way," she snapped, her voice cold and professional.

Aizawa, caught off guard by her authority, nodded grudgingly. "Fine."

"Follow me," she ordered, her tone leaving no room for debate. The two of them moved through the maze of shipping containers, with Amy eliminating the criminals with surgical precision. Eventually, they reached a warehouse. Inside, a man held a young girl hostage, his weapon pressed to her temple.

Aizawa cursed under his breath, seeing the situation escalate. "Wait, don’t—"

But Amy didn’t wait. She moved in, ignoring his protests, determined to save the hostage. As she advanced, a shot rang out. She cried out in pain, a bullet hitting her in the shoulder, but her resolve didn’t waver. With her non-dominant hand, she pulled out her sidearm, firing a single round into the mob boss's head, dropping him instantly. As the shock began to set in, Amy stumbled, blood staining her clothes. Moments later, she collapsed from blood loss just as the police arrived.

---

Amy woke in a sterile hospital room, her shoulder bandaged. She sat up slowly, the fog of painkillers clouding her thoughts. A nurse entered, looking relieved.

"You're awake. Good thing you got here in time. Your parents must be worried sick—"

"I don't have parents anymore," Amy interrupted, her voice flat.

The nurse hesitated. "So you're an orph—"

"I'll take it from here," a man’s voice cut in. Standing in the doorway was a serious-looking detective in a coat, followed by the shaggy man she recognized from the docks—and a small, mouse-like figure standing beside them. Amy's attention snapped to them immediately.

"Hello, young lady," the man in the coat said, stepping forward.

"I'm not young," Amy responded coldly.

The man flinched as his quirk—Lie Detector—registered her words as the truth. His expression shifted to shock. "It can't be..." Naomasa Tsukauchi whispered in disbelief.

"I take it from your statements," the mouse-like figure, Principal Nezu, began, "that we’re dealing with something quite rare. What’s your quirk?"

"Youth," Amy said bluntly.

"It’s not," Naomasa interjected, his quirk immediately identifying the lie.

Amy’s eyes widened. "But it is—"

*Lie*, Naomasa’s quirk registered again.

"Is it immortality?" Nezu asked, his curiosity piqued.

Amy hesitated, then shook her head. "No."

*Lie.*

"I can tell you're lying," Naomasa said, his voice stern. Amy paled as he continued. "And judging by what I've gathered, it’s likely something like immortality, isn’t it?"

Amy’s tough demeanor cracked for the first time. She bit her lip and nodded reluctantly. "Yes," she whispered.

*Truth.*

"Just how old are you?" Naomasa asked, leaning in slightly.

"97," Amy replied softly.

*Truth.*

"Fascinating," Nezu mused, rubbing his chin. "From your gear and your actions, I’d guess you’re a soldier?"

"Lieutenant Amy Laidlaw, United States Marine Corps Special Forces. Anti-Quirk Combat and Containment Unit. 107th Tactical Division," she answered, her tone sharp and official.

"I’ve heard of your kind but never met one in person," Nezu said, intrigued. "I want you in my school."

Amy narrowed her eyes. "And what if I refuse?"

Nezu’s smile was unsettling. "Who do you think let the data on that trafficking ring slip to you? Your base commander seldom says no to me. I’m not asking. It’s... fun being me."

Amy’s shoulders sagged in defeat. "I don’t have a choice, do I?"

"You learn quickly. You’ll make a fine addition to our staff. You may call me Principal Nezu," he said, extending his paw.

Amy didn’t shake it. Instead, she stared at the ceiling, already resigning herself to this new chapter of her life.