Suguru Geto

Gojo and Geto were classmates and considered the most powerful mages of their generation. They shared a close friendship: they called each other by their first names, which in Japanese culture signifies a trusting relationship. They endured many trials together, and their bond seemed unshakable. Initially, Geto held humanitarian views, believing that jujutsu masters should protect non-mages (people without magical abilities). Gojo, for his part, opposed the idea of ​​the strong protecting the weak, questioning why such a thing should be the responsibility of mages. As a result, Geto developed radical beliefs: he came to believe that only mages should rule the world, while ordinary people should be exterminated. His logic became utilitarian: remove the source of suffering, not deal with the consequences.
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Conflict and Rupture
Over time, Gojo and Geto's paths diverged. Gojo chose the path of a reformer: he sought to change the system from within to make it fairer for mages. He became a mentor to raise a new generation capable of living without those like himself.
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Geto, however, became an antagonist. He created the "Star Religious Group" and organized the "Night Parade of a Hundred Demons"—a large-scale clash with the Magic College.
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In the finale, after losing the fight to Yuta Okkotsu, Geto was mortally wounded. Gojo found him in an alley and, instead of turning him over to the authorities or destroying his body, decided to take his former friend's life. It wasn't hatred, but an ideological rift. According to Gojo's voice actor, Yuichi Nakamura, their quarrel wasn't the result of hatred, but rather a divergence in their philosophical views and conclusions about how to live in a world filled with cursed energy and moral ambiguity.
Maintaining mutual care. Even after the breakup, Gojo never stopped caring for Geto. For him, Geto was always more than just a force, but a person he loved.
Lack of dramatic conflict. Neither of them was able to express what they really were.

Suguru Geto was one of the four Special Rank shamans and was considered the worst of all curse masters due to the level of danger he posed to humanity.

During their student years, Suguru and Satoru were considered the "strongest."[16] Suguru was able to easily deal with experienced curse masters. His collection of cursed spirits was extensive and featured a wide variety of different abilities and roles in combat. Suguru was not overly reliant on his curses and was a highly capable close-combatant. High Tactical Intelligence: Suguru Geto was always a brilliant student at the Magic College. If Satoru forgot key points about Lord Tengen and other details of their missions, Suguru would remember and explain them to him. His intelligence was well demonstrated in combat, as he could always think one step ahead of his opponent. The older and more experienced curse master attempted to outsmart the cursed spirit manipulator and move in closer, but fell into Suguru's trap. As the name suggests, Suguru's technique allows him to manipulate the cursed spirits he has absorbed. Dominant curses are absorbed into small black balls that Suguru must ingest orally to use.[45][37] He can also absorb the cursed spirits of other shamans if he kills the host first.[Maximum Technique - Cursed Spirit Manipulation combines a massive amount of collected curses into a single powerful attack. Suguru used over four thousand curses in his Maximum Technique during the climax of his battle with Yuta and Rika.[46] A type of barrier that is created over a large area to hide everything inside from the outside world. Suguru can create curtains capable of trapping shamans, and can do so over another, weaker shaman barrier.

The experience of a shaman. This experience engendered a deep hatred for non-shamans. Suguru considered non-shamans disgusting and even sprayed himself to disinfect the "monkey stench."
Escort mission for Rika Amanai. It was heartbreaking for Geto to protect the girl, only to have her soul perish at such a young age.
A conversation with Yuki Tsumuko. The conversation prompted Geto to the idea that if it's impossible to free the world from curses by turning the entire society into mages, then all non-mages must be exterminated.
A mission to save a village shrouded in a curse. There, Geto found two girls locked in a cage in inhumane conditions. The girls were mages, and the village community blamed them for the illness that had befallen the villagers. The creation of the cult was linked to Suguru Geto's ideology. He considered ordinary people inferior to jujutsu sorcerers and made it his mission to create a world free of humans. The cult was a source of resources that Geto intended to use to implement his new world order.
Unlike them, Suguru cared deeply for his fellow curse masters, calling his commanders family. Each of them still reveres Suguru for putting shamans first as a race and hopes he would become the king of the shaman world. Suguru was even polite to shamans, though this was usually expressed through one of his false identities. He pretended to befriend Yuta Okkotsu with the full intention of killing him in the future, and insulted one of his friends shortly after expressing his friendship.

His masquerade attire included a golden kashaya robe over a black yukata, white tabi socks, and zori sandals. His hair was partly combed back, while the rest flowed down his back, sometimes obscuring his left eye. He had black hair and elongated brown eyes, sharp features, and a calm and calculating character who considered mages a superior race and considered non-mages "monkeys." He was smug and extremely condescending toward ordinary people, using false identities to lure in vulnerable individuals who were cursed.
Initially, Suguru believed that mages existed to protect ordinary people from curses. However, after one incident, he began to change and see the world differently. Suguru dropped out of college and dedicated himself to hating ordinary people and creating a new world where only mages would exist.
I couldn't find myself between my duty as a magician and my natural rage and resentment at the unfair world.
He didn’t consider himself a winner, he was always attached to something that he never stopped putting above himself (responsibility, peace, Gojo).
He was empathetic and sensitive to others, which was evident in his diplomatic role in dialogues.
He was used to thinking about other people, for example, he answered Haibara's question about souvenirs without thinking, taking into account Satoru's interests.
Over time, a deep-seated hatred for non-mages developed in his beliefs, as he realized that not only were they the source of curses, but their ignorance was harming even children like Nanako and Mimiko. Experience as a shaman. This experience engendered a profound hatred for non-shamans. Suguru considered non-shamans disgusting and even sprayed himself to dispel the "monkey stench."
Escort mission for Rika Amanai. It was heartbreaking for Geto to protect the girl, only to have her soul perish at such a young age.