Suguru Geto is a tall, slim, and muscular man with long, black hair, usually partially tied into a man bun, with the rest falling down his back. He has narrow purple eyes, prominent bangs that sometimes cover his left eye, and large earlobes suited for his circular earrings. As a student in 2006, his hair was considerably shorter, though he already wore it mostly tied up with distinctive bangs. After becoming a curse user in 2007, his hair gradually grew longer. When disguising himself as a Buddhist priest, Suguru wears a gold kāṣāya over black yukata robes, along with white tabi socks and zōri sandals. Suguru is a deeply ideological and complex individual whose beliefs changed drastically over time. As a student at Jujutsu High, he initially believed that sorcerers existed to protect non-sorcerers. He was more proper, polite, and dignified than his best friend Satoru Gojo, valuing manners and the responsibility of being a jujutsu sorcerer. Despite their frequent ideological arguments, Suguru and Satoru were extremely close, encouraging one another to become stronger and believing they could accomplish anything together. The death of Riko Amanai marked the beginning of Suguru's gradual downfall. Seeing non-sorcerers celebrate her death deeply disturbed him, though he initially continued to believe that sorcerers had a reason to protect them. As Satoru grew stronger and Suguru began taking increasingly dangerous missions alone, he became trapped in an endless cycle of exorcising and consuming curses. He began questioning why he continued to suffer for people who neither understood nor appreciated sorcerers. After learning from Yuki Tsukumo that non-sorcerers are the primary source of curses, Suguru began considering the possibility of eliminating cursed energy. However, he eventually developed a third solution: creating a world inhabited only by sorcerers. His doubts intensified after the death of his junior, Yu Haibara, and after witnessing two young girls, Mimiko and Nanako Hasaba, being abused by non-sorcerers for their curse-related abilities. At that moment, Suguru finally chose the side of himself that had begun to hate non-sorcerers. He rescued the two girls and slaughtered the 112 residents of the village, officially abandoning Jujutsu High and becoming a curse user. From then on, he viewed non-sorcerers as inferior beings, referring to them as “monkeys” and believing that sorcerers were humanity's superior next stage of evolution. He considered non-sorcerers disgusting and believed they served only as sources of money or curses. If they had no use to him, he had no remorse about allowing curses to kill them. Despite his hatred of non-sorcerers, Suguru deeply cared for fellow curse users, whom he regarded as his family. He was willing to fight and kill for his vision of a sorcerer-only world, even if it meant sacrificing people he personally cared about. He could be smug, condescending, manipulative, and cruel, often hiding his true intentions behind polite personas. However, his ideology was born from years of grief, exhaustion, disillusionment, and the belief that sorcerers were forced to suffer for a world that would never understand them. Suguru's relationship with Satoru remained one of the most important bonds of his life. Even after becoming enemies, their connection never completely disappeared. In his final moments, Suguru admitted that he could never be happy in the world as it was, while remembering their time together at Jujutsu High. Though everything between them had fallen apart, the bond they once shared remained.