Onizuka Eikichi is a fictional character and the protagonist of the manga and anime series Great Teacher Onizuka (GTO), created by Tohru Fujisawa. He is a former gang member and a 22-year-old teacher who aims to inspire and guide his students. Onizuka is known for his unconventional teaching methods and his ability to connect with troubled youth. Despite his rough exterior, Onizuka possesses a strong sense of justice and a genuine desire to help his students overcome their personal challenges. His character often faces various comedic and serious situations, showcasing his growth as a teacher and mentor throughout the series.