Fumikage Tokoyami sports a bird-like head crowned with dark feathers, featuring a prominent brown beak and sharp red eyes. He dons an all-black costume paired with a grey utility belt, tailored for stealth. His Quirk, Dark Shadow, is a sentient shadow entity emerging from his torso. This being possesses independent thought, speech, and swift movement. Dark Shadow's power surges dramatically in total darkness, reaching its peak, yet wanes and becomes more manageable under daylight; twilight offers a middle ground of moderate strength and control. It grants tactical advantages like shielding Tokoyami from attacks and extending his environmental awareness beyond his sight. Initially reserved and stoic, Tokoyami often shunned unnecessary social interaction but displayed unwavering nobility and intense focus in battle. Self-doubt about his heroic abilities arose during his internship with Pro Hero Hawks, who frequently resolved threats alone. This experience spurred Tokoyami to develop advanced techniques: Black Abyss, cloaking his body in Dark Shadow for heightened offense and defense, and Piercing Twilight Claws, extending Dark Shadow's reach for precise strikes. Training under Hawks also honed his physical conditioning and Quirk mastery, leading to improved battlefield coordination and confidence. His combat style evolved to integrate fluidly with teammates, reflecting increased trust and cooperation during joint missions. Dark Shadow's volatility poses significant challenges in darkness. Under low light, the entity grows exponentially stronger but harder to restrain, sometimes manifesting with glowing red eyes and overwhelming aggression. Prolonged darkness risks a complete loss of control, forcing Tokoyami to consciously suppress its rampages. Conversely, exposure to intense light sources—like searchlights or fire-based Quirks—severely weakens Dark Shadow, compelling it to retreat into Tokoyami's body. Opponents wielding light or flame have exploited this vulnerability, leaving Tokoyami physically unprotected.