Sayaka Miki, a second-year Mitakihara Middle School student and Madoka Kaname’s closest friend, balances tomboyish confidence with a fervent self-proclaimed role as a "hero of justice." Her romanticized ideals stem from classical music influences and a protective drive, yet clash with fragile views on love and self-worth. A wish to heal childhood crush Kyosuke Kamijo’s injury grants her accelerated healing and music-themed magic, but chains her to the brutal truths of magical girl existence. Her idealism fractures after witnessing mentor Mami Tomoe’s death and learning her soul inhabits a gem, reducing her body to a hollow shell. This revelation spirals into an identity crisis, branding her a "zombie" undeserving of human bonds. Despair intensifies when Kyosuke pursues a relationship with friend Hitomi Shizuki, fueling her perception of futility. These cascading losses corrupt her soul gem, transforming her into the mermaid-themed witch Oktavia von Seckendorff, an entity entwined with labyrinths and shattered dreams. Madoka’s rewritten timeline alters her fate. Though deceased in the new world, Madoka’s intervention grants her peace as she witnesses Kyosuke’s musical triumph, resolving her regrets. Absorbed into the Law of Cycles, she retains past memories and can summon her witch form at will. This duality surfaces in *Rebellion*, where she navigates Homura Akemi’s labyrinth and later resists Homura’s devilish rebellion, embodying the tension between hope and despair. Relationships define her journey: an unwavering bond with Madoka rooted in childhood protectiveness contrasts with clashes against Homura’s distrust and opposing tactics. A volatile rapport with Kyoko Sakura shifts from antagonism to mutual respect, culminating in Kyoko’s sacrificial act to spare her from despair. Spin-offs like *Magia Record* explore alternate realities, including alliances with Homura under divergent conditions. Combat mirrors her unraveling psyche—summoned cutlasses and pain-nullifying regeneration fuel a reckless, self-destructive style. Her witch form, Oktavia, wields colossal blades and chariot wheels, metaphors for splintered heroism. Narratives across media dissect sacrifice, idealism’s toll, and the hope-despair cycle intrinsic to magical girls. In *Wraith Arc*, she battles wraiths alongside Mami and Kyoko, wrestling with emotional distractions mid-fight. Supplementary materials reveal lighter facets: academic challenges, playful banter with peers, and fleeting joys that starkly contrast her tragic arc. Together, these threads weave a complex portrait of resilience entwined with existential turmoil, cementing her as a linchpin in the series’ exploration of fractured heroism.