Sae Itoshi is a Japanese midfield prodigy celebrated as one of his generation’s most technically skilled players. Originally determined to become the world’s top striker, he pivoted to midfield after joining a Real Madrid-inspired Spanish youth academy, disillusioned by what he deemed Japan’s inferior football standards. He openly scorned his homeland’s approach, even lamenting his Japanese origins, and vowed to conquer European football—prioritizing UEFA Champions League glory over Japan’s domestic league. Standing 175 cm (5'9") with magenta hair and piercing teal eyes, Sae exudes a cold, analytical demeanor. His arrogance and blunt pragmatism mask a relentless drive for self-improvement, dismissing those he considers beneath his skill level. Yet his tactical genius and reputation compel respect, enabling strategic alliances like his temporary role with the Japan U-20 team against the Blue Lock Eleven. On the field, Sae’s playmaking mastery shines through precise passes, visionary awareness, and techniques like the Trivela pass, Line Drive Shot, and inventive nutmegs such as the Cross Elastico and Rabona Nutmeg. His "Reflex" skill lets him instantly dissect defenses, while Metavision—a heightened observational prowess—allows him to manipulate games with surgical control. These talents secured his place in the New Generation World XI, affirming his global stature. Central to his story is his fractured bond with younger brother Rin Itoshi. Once united by a shared dream to dominate as strikers, Sae’s move to Spain and midfield transition shattered their connection. A decisive one-on-one match ended with Sae crushing Rin’s aspirations, branding him forever "Sae Itoshi’s younger brother." Yet during the U-20 clash, Sae begrudgingly acknowledged Rin’s progress and the promise of rivals like Yoichi Isagi, hinting at shifting perspectives. Collaborations reveal Sae’s strategic flexibility. Partnering with volatile striker Ryusei Shidou in the U-20 match, he harnessed Shidou’s ferocity to execute daring plays, including a hat-trick via his pinpoint assists. He also recognized Isagi’s tactical ingenuity, conceding his potential to redefine Japanese football. Post-U-20, Sae’s location remains undisclosed, but the match tempered his disdain for Japan’s football potential. While his European ambitions persist, he admitted underestimating Japanese forwards, leaving his future—and possible reconciliation with Rin—an open question amid Japan’s evolving football landscape.