Genya Shinazugawa, a Demon Slayer defined by his harsh exterior and unorthodox tactics, carried a legacy of familial tragedy. Born into a household fractured by his father’s abuse—later ended by villagers—Genya and his older brother Sanemi swore to shield their mother and siblings. This vow shattered when their mother, transformed into a demon, slaughtered four children before Sanemi struck her down. Genya’s misplaced blame toward his brother forged a lasting estrangement, fueling his entry into the Demon Slayer Corps to seek both redemption and reconciliation. First encountered during Final Selection, Genya’s volatile nature erupted in threats to secure his Nichirin sword, his scarred face and perpetual scowl mirroring Sanemi’s intensity. Physical transformations followed: a towering height of 180 cm, a spiked mohawk, and temporary demonic traits—yellow-tipped hair, fangs, and piercing eyes—activated by consuming demon flesh. Barred from mastering Breathing Styles, Genya channeled Repetitive Action, using Gyomei Himejima’s Buddhist chants to mimic Breathing’s effects. His unique physiology allowed him to absorb demonic powers, granting enhanced strength, regeneration, and Blood Demon Arts—a controversial tactic that isolated him and deepened his anguish over Sanemi’s rejection. Armed with a Nichirin shotgun firing Scarlet Crimson Iron Sand rounds and a wakizashi, Genya blended ranged ferocity with close combat. In the Swordsmith Village, his consumption of Aizetsu’s flesh proved pivotal against Hantengu, while his uneasy alliance with Tanjiro hinted at growing teamwork despite clashes with peers. Facing Kokushibo in the Infinity Castle, Genya’s ultimate sacrifice unfolded: ingesting the demon’s flesh and sword fragment awakened his Demon Slayer Mark, crucial to the Upper Rank’s downfall. Mortally wounded, his final plea to Sanemi—a confession of love and a wish for his brother’s happiness—echoed their unresolved bond, later acknowledged in Sanemi’s grieving reflection. Genya’s journey bridged personal torment with broader themes of sacrifice. His hybrid abilities challenged the Corps’ rigid boundaries, underscoring moral complexity while his relentless protection of others, even in death, wove familial love and redemption into the fabric of his legacy.