Yayoi Kunizuka, a Tokyo native and daughter of Morihiro Kunizuka, first embraced music at nine, mastering the guitar before joining the Sibyl-sanctioned punk band *Amalgam*. Her career derailed when her association with anarchist Rina Takizaki triggered a destabilized Psycho-Pass, leading to confinement and eventual recruitment as a Public Safety Bureau Enforcer—a role she accepted to reunite with Takizaki. Specializing in drone operations, Kunizuka navigated high-risk missions with tactical precision, her composure unshaken under pressure. A deepening bond with analyst Shion Karanomori blossomed into romance, surviving separations and secrets, including Karanomori erasing incriminating footage of Kunizuka’s past. They later reunited, choosing to share a life beyond the Bureau. Tasked with investigating the Sanctuary prison in the *Sinners of the System* trilogy, Kunizuka uncovered its illegal nuclear waste exploitation. Drugged and detained by facility staff, she thwarted their efforts, leveraging her strategic expertise to expose corruption and rescue Enforcer Nobuchika Ginoza from a lethal fall. Post-Bureau, she transitioned to freelance detective work, her investigative instincts sharpened by years of field experience. A Seijou Secondary School graduate and former Sibyl-approved artist, her removal from the sanctioned list marked her turbulent history. Her motto, “Punk is attitude, not style,” echoed her admiration for bands like The Clash, blending rebellion with pragmatic self-reliance. Colleagues like Shusei Kagari and Akane Tsunemori valued her dry wit and mediating presence, while her quiet empathy surfaced in moments like comforting traumatized Inspector Mika Shimotsuki. Ultimately, Kunizuka’s journey—from latent criminal to restored citizen—embodied resilience, balancing defiance against the Sibyl System with an unwavering pursuit of justice, her individuality intact.