Carlos

He made his debut in Captain Tsubasa chapter 51, "Opening Ceremony".
He serves as Tsubasa Ozora's private language tutor, assisting him during his final year of middle school to prepare for his move to Brazil. He is frequently seen at the Ozora residence and also supported his student during the middle school tournament finals.
Carlos is quite cheerful yet remains focused on ensuring Tsubasa becomes a diligent student, often teasing him for prioritizing football (even by cutting lessons short) over his Portuguese studies.