Hinata Sakaguchi, a Japanese teenager, endured a childhood scarred by domestic violence under her gambling-addicted father, who abused both her and her mother. Driven to desperation, she killed him by pushing him off a cliff to protect her mother, an act that shattered her mother’s psyche. As Hinata prepared to end her mother’s suffering, she was abruptly transported to another world during her high school entrance ceremony. In this new realm, she swiftly encountered bandits, defeating them and awakening two Unique Skills: *Usurper*, which copies opponents’ abilities, and *Mathematician*, enabling tactical combat analysis. Her skill drew the attention of Shizue Izawa, an Otherworlder who mentored her. Though Hinata surpassed Shizue rapidly, lingering distrust drove her to leave, though she retained profound respect for her teacher. She joined the Holy Empire of Lubelius, ascending to command the Ten Great Saints and Holy Knight Order as right hand to Luminous Valentine—the vampire queen posing as the empire’s goddess. Her traumatic past solidified her pragmatic worldview, valuing strength as the ultimate survival tool. Aligned with the Church’s anti-monster doctrine, she clashed with Rimuru Tempest after falsely accusing him of Shizue’s murder. Their conflict escalated through battles, including a duel where Hinata trapped Rimuru in an anti-magic barrier and wielded *Dead End Rainbow*, a rapier severing spiritual essence. Discovering Rimuru’s innocence regarding Shizue’s death shifted their dynamic. Betrayed by corrupt Church leaders and fatally wounded, Hinata was resurrected by Luminous, fueling her determination to pursue justice. Gradually, her rigid ideals softened. She allied with former adversaries like Rimuru, recognizing shared peace goals. Mastering the Ultimate Skill *King of Fortune* granted spacetime manipulation and heightened perception. Time-loop trials and sacrifices forged a bond with hero Chloe Aubert, culminating in her pivotal role during a cataclysmic war, fighting alongside Rimuru against existential threats. Hinata balances icy pragmatism with latent empathy, enforcing merciless justice while showing loyalty to allies and gentleness toward children. Her charismatic leadership masks lingering trauma that surfaces in moments of self-doubt. Though renowned for ruthlessness, her actions ultimately strive to safeguard humanity, even through morally ambiguous alliances. Her arc spans exposing the Seven Luminaries’ corruption, surviving assassination plots, and reconciling with Rimuru. This journey transforms her from a vengeance-driven knight into a hero championing collective peace, embracing moral complexity and the dual-edged nature of power.