Isagi Yoichi is a 17-year-old soccer player, standing at 5'9" (175 cm). He has short, spiky blue hair and sharp, expressive eyes. His physique is lean yet athletic, reflecting his agility and speed on the field. Isagi's facial features are youthful, with a determined expression that often shifts between focus and intensity during matches. His posture conveys a sense of confidence and determination, which mirrors his growth as a player throughout his journey.