Sogo Tokiwa is the protagonist of Kamen Rider Zi-O, a high school student who dreams of becoming a king. He is chosen by fate to inherit the power of Kamen Rider Zi-O and travels through time to confront powerful enemies known as Time Jackers and other Riders. Kind-hearted but ambitious, Sogo grows into a leader while struggling with the burden of his destiny and the consequences of changing history.