Martis Jun Asari, also known under variations like Jun Marchs Asari and Asari Marches Jun, plays football for Tokyo Esperion. The Japanese academic year structure makes him the team's youngest member. Born to an English father and a Japanese mother, his mixed heritage shows in blond hair and a cool, beautiful demeanor. He stands 175cm tall, weighs 65kg, has blood type O, and celebrates his birthday on February 14. He wears jersey number 25. Promoted directly from Esperion Junior Youth, he serves as a full-back or side back for Esperion's B Team. His positional flexibility allows him to cover both left and right defensive flanks. He shows balanced proficiency in defense and offense, with a particular aptitude for overlapping runs and attacking play. His personality exhibits pronounced pride. This manifests prominently in his initial interactions with teammate Ashito Aoi, whom he perceives as technically inferior. He frequently adopts a condescending or dismissive attitude towards Ashito, openly expressing dissatisfaction regarding Ashito’s inclusion in the youth team. His role remains consistent as a supporting character within the team dynamic.