Born June 23, Misugi debuted for Musashi elementary school wearing jersey #14 in tribute to his idol, Johan Cruyff. He showcased exceptional technical skill, tactical intelligence, and midfield versatility. His heart condition drastically limited his playing time, confining him to brief appearances to prevent collapse and earning him the nickname "Ace of Glass." Early matches, like the intense 5-4 semifinal loss to Tsubasa Ozora's Nankatsu, revealed his fierce determination to play fully despite the medical danger. In middle school, Misugi focused on rehabilitation, managing his condition with support from eventual romantic partner Yayoi Aoba. He returned with a strict 30-minute match limit, yet suffered a collapse during the Tokyo prefecture final against Kojiro Hyuga's Toho. His tactical brilliance secured him a role as assistant coach for Japan's Junior Youth team; there, his strategies included repositioning Hikaru Matsuyama as a defender. He participated as a substitute player in the International Junior Youth tournament against Argentina and France. His health showed gradual improvement, leading him to resolve to pursue football alongside medical studies, inspired by Brazilian player Sócrates. During the World Youth arc, now recovered from his heart condition, Misugi transitioned to the libero position, modeled after Italian defender Baresi. He endured demanding training and scored a vital equalizer against Thailand using his Drive Shot. His unique on-field intelligence enabled him to understand and support Tsubasa's Skydive Shot technique during the Mexico match. Professionally, Misugi joined Bellmare Hiratsuka before transferring to FC Tokyo in the J1 League, playing as a right midfielder. He earned selection for Japan's Olympic team ("Golden-23" arc), where coach Kira relied on him alongside Taro Misaki and Matsuyama for tactical balance during Asian qualifiers. In the "Rising Sun" arc, during an Olympic match against Germany, he suffered a near-fatal collapse after blocking Karl-Heinz Schneider's Fire Shot, requiring CPR from Tsubasa. He recovered and continued playing, later offering defensive advice from the bench against Spain. Yayoi expressed hopes for marriage, though his health remained a concern. Misugi's techniques include the Slice Shot, Crystal Overhead, and Sky Rocket Volley. His signature moves emphasize precision, like the Drive Shot and Magnificent Dribble. Strategic skills reflecting his intellect and adaptability include Field's Conductor (boosting teammates' speed and technique) and Meister (enhancing stats based on team strengths). Analytical, kind, and resilient, Misugi demonstrates empathy through actions like assisting Hyuga's family and applying medical knowledge to treat teammates' injuries. His relationship with Yayoi is central to his emotional growth. His perseverance transformed him from a physically limited talent into a cornerstone of Japan's defense.