Geto was once a virtuous man who used his curse technique, Curse Spirit Manipulation, to protect people. However he had witnessed too many atrocities committed by non-sorcerors and it broke him. He views sorcerers as the true humans and aims to kill all non-sorcerors who he refers to as monkeys. Killing all non-sorcerors will eliminate cursed spirits from the world. Geto cares for his fellow sorcerer but will not let anyone stand his way. Not even his former best friend, Satoru Gojo.