Misugi Jun is a highly skilled Japanese football player first introduced as a prodigious midfielder from Musashi, wearing jersey number 14 for both his school team and the Japan Junior National Team. Despite exceptional talent considered potentially superior to the protagonist Tsubasa Oozora, a severe heart condition defines his early career. This health issue restricts his playing time to brief intervals, earning him the nickname "Ace of Glass," and causes collapses during critical matches, like after Musashi's victory over Furano, leading to hospitalization. Doctors initially rule him out of subsequent games, creating significant emotional turmoil about his football future. Determined to compete, Misugi undergoes extensive rehabilitation over several years, refraining from playing entirely. This recovery period coincides with his academic pursuit of medicine, inspired by Brazilian footballer Socrates. His relationship with Yayoi Aoba provides crucial emotional support throughout his convalescence. After successfully passing rigorous medical evaluations confirming his recovery, Misugi returns to competitive football, demonstrating resilience and dedication. Tactically, Misugi possesses exceptional field intelligence, enabling him to analyze opposing formations and strategies even when not actively playing. His ability to control opponents' movements and read game dynamics establishes him as a strategic leader. Initially positioned as an offensive midfielder (OMF), his role evolves significantly post-recovery. During the World Youth arc, he shifts from an attacking approach inspired by Johan Cruyff to adopting a libero (sweeper) role modeled after Franco Baresi, leveraging his tactical awareness for defensive organization and ball distribution. In the *Road to 2002* storyline, Misugi joins FC Tokyo in Japan's J-League First Division. Operating primarily as a right midfielder, his versatility allows him to influence matches through both creative play and defensive contributions. A notable league match against Consadole Sapporo, captained by his national teammate Matsuyama Hikaru, ends in a 1-1 draw, with Misugi expressing particular respect for Matsuyama's shooting power. His international career progresses through multiple tournaments. Selected for Japan's Junior Youth team, he serves as both player and assistant coach, contributing strategic insights such as deploying Matsuyama as a central defender. His condition limits him to super-sub appearances during the International Junior Youth Tournament, though he feels his heart growing stronger through competition. Later, he earns selection for the U-20 Japanese national team during the Asian qualifiers, scoring a crucial equalizing goal against Thailand. During the World Youth Championship, he demonstrates tactical adaptability by comprehending and supporting Tsubasa's innovative "Sky Dive Shoot" against Mexico. In the *Golden-23* arc, Misugi is selected for Japan's Olympic team. Coach Kira entrusts significant responsibility to him, Matsuyama, and Misaki—collectively termed the "3M" or "Three Shooting Stars"—to manage team balance during the Asian qualifiers, specifically valuing Misugi's calm discernment for navigating high-pressure matches. His technical skills encompass a diverse repertoire. Signature techniques include the "Slice Shot," the aerial "Crystal Overhead," and the powerful "Sky Rocket Volley." His dribbling features the "Magnificent Dribble" and "Rolling Dribble," while defensive capabilities include the "Shoulder Charge" tackle and the "Overhead Block." He also possesses captain skills like "Battle of the Aces," and various passive skills such as "Glass Ace," "Technician," and "Meister." Beyond playing, Misugi accepts a player/coach position with Japan Junior, contingent on his full participation and excellence. His intellectual approach extends to tactical advising during periods when he cannot play. Following the World Youth Championship, he expresses uncertainty about his future path but maintains intentions to continue medical studies alongside football. In the latest narrative developments (*NEXT DREAM*), Misugi continues challenging his limits by joining Amsterdam, competing in foreign leagues. Described as deciphering any situation with acute perception, he enchants observers with creatively improvised plays, maintaining his reputation as the "Field Prince" on the international stage.