Nagisa Misumi, alias Cure Black, begins her journey when the Garden of Light's emissary Mepple crash-lands on Earth during a meteor shower. A second-year student at Verone Academy, she shines as a star lacrosse player celebrated for her athletic prowess but faces challenges in her academics. Though initially hesitant to embrace her destiny, she ultimately accepts her role as a Pretty Cure warrior alongside Yukishiro Honoka (Cure White), forging an unbreakable partnership built on mutual trust and contrasting personalities—Nagisa’s energetic, hot-headed nature perfectly balancing Honoka’s calm intellect. Her everyday look features short ginger hair, light brown eyes, and slightly tanned skin. She typically wears a black-and-white raglan shirt under a pink jacket, a red skirt, pink knee socks, and sneakers. Transforming into Cure Black elongates her hair with swept bangs and adds silver heart earrings. Her battle outfit consists of a black crop top with pale pink ruffles, a matching skirt featuring a leg-revealing slit, black shorts underneath, and magenta boots with heart-adorned leg warmers. The *Max Heart* design evolves into a one-piece suit with a dark magenta vest, gold-accented belt, and extra ruffles, modified to cover her midriff following parental feedback about potential health concerns. Nagisa's personality bursts with boisterous energy and impulsiveness, often exclaiming catchphrases like "Unbelievable!" ("Arienai!") or "Lucky!" ("Rakkī!"). Despite her tomboyish athleticism, she displays distinctly girlish habits: collecting stuffed animals, overspending while shopping, and feeling self-conscious envy over Honoka's popularity with boys. She maintains a large appetite, favoring chocolate and "yaki"-suffixed foods like takoyaki. Beneath this vibrant exterior lies acute sensitivity, a fierce sense of justice, and profound loyalty, often unleashing heightened power when Cure White is threatened. Key relationships shape her path: her profound bond with Honoka deepens from partnership into lifelong friendship; her protective, teasing dynamic with younger brother Ryouta (using her "Cobra Twist" to silence him); and her flustered crush on Honoka's childhood friend, Fujimura Shougo. Her rapport with Mepple shifts from initial friction to genuine affection, shown when she mourns his temporary departures. In *Max Heart*, she befriends Kujou Hikari (Shiny Luminous), choosing to protect her purely out of friendship, rejecting any utilitarian motive. Her story extends across various media beyond the core series. In anniversary crossovers like *HUGtto! Pretty Cure* and *HappinessCharge PreCure!*, she appears as Cure Black alongside other legacy Cures to confront existential threats. A spin-off narrative explores an alternate timeline where Nagisa and Honoka, missing after a mission to the Dark Zone, are brainwashed by the Dark King—Nagisa becoming the antagonist Silhouette, wielding thunder-based powers and a black Sky Jewel Key. Purified, she regains her Cure Black identity, later revealed as the mother of Fujimura Aika, whom she guides through dreams. Her combat style emphasizes raw physical strength and lightning-based attacks, frequently executed in tandem with Cure White, such as the "Marble Screw." Power-ups include "Golden Cure Black" (gold-themed attire) and "Super Cure Black" (wing-like ruffles, enhanced hair vibrancy). Within the *All Stars DX* film continuity, she participates in large-scale team attacks like "Extreme Heart Sky Jewel," consistently demonstrating her core traits: unwavering courage and deep devotion to her allies.