Gohan's alter ego, the Great Saiyaman, was created as a disguise for his true identity during his school days in Satan City. His first transformation into this persona occurred when he fought bank robbers on his first day of school. Despite his passion for martial arts, Gohan preferred to avoid the limelight, leading to the creation of the Great Saiyaman. This persona was also used in his fight against Watagash-possessed Barry Kahn, earning him the title Super Great Saiyaman. However, balancing school and superhero life was challenging, arousing suspicion among his peers and teachers.