Itsuki Kawasumi hails from an alternate Japan where supernatural abilities are common. His power, "Accuracy," guarantees that any ranged attack strikes its target unless blocked. Despite this, he was deemed low-tier among his peers, leading to bullying and an inferiority complex that fueled his desire for recognition and superiority. Struck by a truck while returning from preparatory school, he was summoned to another world as the Bow Hero, one of Melromarc's Four Legendary Heroes. Itsuki initially interpreted this new world through the lens of the video game "Dimension Wave," solidifying his belief in a destined heroic role. His personality blended a self-proclaimed sense of justice with a deep-seated need for praise. He undertook covert missions to eliminate corrupt nobles and rescue villages, often prioritizing admiration over genuine aid. This approach sometimes worsened situations, like destabilizing famine-stricken regions by removing leaders without addressing root causes. His arrogance and gullibility made him susceptible to manipulation, first by the Church of the Three Heroes and later by Malty S Melromarc, who exploited his distrust of the Shield Hero, Naofumi Iwatani. In combat, Itsuki wielded the Legendary Bow, enabling him to replicate ranged weapons such as crossbows or guns, firing energy projectiles. His "Accuracy" ability synergized perfectly, making his attacks exceptionally hard to evade. Key techniques included "Wind Arrow," "Thunder Shoot," "Arrow Rain," and the armor-piercing "Eagle Piercing Shot." He also utilized support magic like "Down" to weaken enemies and possessed healing capabilities. Beyond battle, he demonstrated prodigious musical talent, instantly mastering instruments and employing "performance magic" in other worlds. His downfall escalated during the Spirit Tortoise incident. After failing to defeat the creature, his party—except Rishia Ivyred—betrayed him, handing him over to the enemy. This betrayal, coupled with Malty's continued manipulation, drove him to despair, activating his Curse Series: the Pride Series. Under its influence, he gained formidable but dangerous skills. The "Justice Bow" brainwashed those struck by its arrows, while "Law Fanatic" encased him in demonic armor that boosted his stats. His ultimate cursed technique, "Bull of Palaris," summoned a fiery brass bull to incinerate targets. However, using the Curse Series eroded his free will, leaving him pliant and easily controlled afterward. Rishia Ivyred, previously expelled from his party for outperforming him, became pivotal to his redemption. She rescued him after his defeat in a cursed state, and her unwavering support helped him confront his past actions. Post-recovery, Itsuki abandoned his pursuit of glory, vowing to atone by openly aiding others alongside Rishia. He remained in the world after the Waves, dedicating himself to genuine justice over secretive vigilantism. His relationship with Naofumi evolved from hostility to a reluctant alliance, recognizing Naofumi's pragmatic leadership during crises like the Spirit Tortoise battle. In spin-offs like *The Reprise of the Spear Hero*, alternate timelines depict Itsuki facing repeated betrayals and manipulations, often stepping into the antagonistic role vacated by Motoyasu Kitamura. These scenarios force him to reevaluate his narrow view of heroism, emphasizing broader justice over personal acclaim. Across media, his journey underscores themes of humility and growth, transitioning from a praise-seeking vigilante to a committed protector.