Kuroko Shirai, a Level 4 teleportation esper, manipulates spatial coordinates across 11 dimensions to relocate herself or objects within an 81.5-meter radius, constrained by a 130.7-kilogram mass limit. Mastering self-teleportation after entering Tokiwadai Middle School, she initially teleported only external targets. Combat leverages martial arts throws and metal spikes drawn from thigh holsters, tactics developed to offset her petite frame. As a Judgment officer in Branch 177, her ironclad commitment to justice strains personal bonds, notably during the Sisters Arc when duty clashes with loyalty to Mikoto Misaka, her roommate and closest confidant. She routinely hides injuries sustained in conflicts—such as her brutal encounter with Musujime Awaki—to shield others from concern. Raised in Academy City’s technocentric society, she blends pragmatism with gaps in traditional Japanese customs, often voicing blunt opinions that spark friction with peers like Kazari Uiharu. Her fervent romantic devotion to Mikoto fuels relentless flirtation, contrasting her tactical leadership during crises like the Poltergeist Incident or STUDY’s mechanized assaults. Hailing from a family managing convenience store chains, she tackled high-risk Judgment cases pre-Tokiwadai, including a bank heist involving a speed-manipulating esper. Enrollment led to her aggressively assigned role as Mikoto’s roommate, displacing another student and incurring disciplinary measures. Their relationship matures from unilateral admiration to mutual dependence, exemplified during the Silent Party Arc as she aids Mikoto in safeguarding Febrie and Janie from shadowy factions. Pivotal growth occurs through clashes like her climactic showdown with Sha Danshan, a former clique leader who duplicated her powers via stolen tech, and her unyielding mental fortitude against Awaki despite critical wounds. Introspection drives her resolve to grow stronger after witnessing Touma Kamijou’s influence on Mikoto. Her name, embodying the duality of “white” (Shirai) and “black” (Kuroko), echoes narratively—Mikoto once quipped about charring her “as black as her name,” while her character song *Desu no! White & Black* underscores this contrast. The signature verbal tic “desu no” punctuates her speech. Balancing comedic extremes—over-the-top affection for Mikoto—with grave missions and moral quandaries, she displays a stern yet caring demeanor toward children. Skeptical of Gemstones or urban legends, she adapts when faced with proof, as seen in her gradual acceptance of Touma’s ability-negating power.