Mirko (Rumi Usagiyama) — My Hero Academia

During the Paranormal Liberation War, Mirko is part of the heroes' operation at Jaku General Hospital. She outruns the main group, breaks into Kyudai Garaki's hidden laboratory, and confronts the real doctor while Tomura Shigaraki is still undergoing artificial enhancement. By reaching the lab before Garaki can escape, she throws his plan into immediate danger.

Garaki releases several High-End Nomu to keep her away. Crust fights through Nomu-filled corridors trying to reach her, while Mirko faces formidable High-Ends on her own. She proves that her ranking is not merely a matter of public reputation: despite fighting alone against multiple High-Ends, she inflicts heavy damage, kills one of them, and remains focused on reaching the laboratory’s central objective.

A High-End Nomu's spatial-warping attack tears away Mirko's left arm. She controls the bleeding and keeps fighting despite further injuries to her ear and right leg. Once she recognizes the danger posed by the capsule holding Shigaraki, she focuses on breaking it before he can awaken.

Endeavor reaches her and pulls her away from the High-Ends, while other heroes continue the effort to stop Garaki’s experiment. Mirko helps damage the capsule, and Present Mic’s intervention further disrupts the procedure, but the heroes ultimately fail to prevent Shigaraki from awakening. Mirko survives the initial raid despite injuries serious enough to remove her from ordinary front-line action for a time.

The injuries at Jaku do not end Mirko’s career. By the Final War she returns equipped with prosthetic replacements for the limbs she lost, including her left arm and right leg. These are functional combat adaptations, not a reversal of the damage or the discovery of a new Quirk. Her decision to return makes the physical cost of the previous operation part of her ongoing story.

Her renewed participation is particularly important at U.A.’s airborne battlefield, where a team of heroes attempts to restrain the extraordinarily powerful Shigaraki while Izuku Midoriya is elsewhere. Mirko fights alongside other professionals rather than single-handedly defeating him.

As the battle against Shigaraki deteriorates, Mirko sustains catastrophic additional damage to her limbs, including her remaining arm. Despite losing mobility and support, she keeps attacking. Other heroes, including Best Jeanist and Mirio Togata, contribute to keeping the fight alive, while Edgeshot attempts to save the critically wounded Katsuki Bakugo.

Mirko’s ferocious sequence of kicks—associated with Luna Rush—helps demonstrate that the seemingly untouchable enemy can still be affected. The scene is not a solo victory: it is a desperate contribution to a collective defense while the heroes await Midoriya. Her willingness to fight on is consistent with the no-regrets philosophy shown during the earlier hospital raid, although it exacts an extraordinary personal cost.

Mirko survives the Final War. Chapter 430's postwar montage shows her using extensive prosthetics, with her left leg the only original limb still shown. Her injuries are not simply undone by the ending: her later appearance retains the physical consequences of both major battles.

The original magazine serialization ends at Chapter 430, but the final collected volume adds Chapter 431, 'More.' Its later Hero Billboard Chart places Mirko at No. 6, confirming that she remains a nationally ranked Pro Hero after the war. Neither chapter provides a detailed account of her private life, and the sixth-place listing is a later ranking, not the No. 5 position at which she first appeared.