Farm caretaker and younger brother of Kotaro. After his brother is captured by the Machine Empire, Teppei follows, sheds blood that awakens the ancient B't X, and joins forces with him to rescue Kotaro and fight against the Machine Emperor to save humanity.
Teppei and his B'T X operate as inseparable combat partners throughout the season.
Forced partnership evolves into deep trust. Teppei provides the blood that awakens X, and they fight side-by-side through numerous battles.
Hokuto serves as a protector and strategic partner, ensuring Teppei's survival and advancing their shared goal.
Direct antagonists. Ron repeatedly targets Teppei to obstruct his progress, establishing a clear enemy dynamic.
Ron acts as a recurring obstacle, testing Teppei's resolve and combat ability before allowing passage toward The Area.
Both are core members of the resistance group traveling toward The Area, supporting each other against the Machine Empire.
Hokuto serves as a steadfast ally and fellow traveler in the group's mission to reach The Area.
Karen and Teppei share a safehouse on Kamui Island, cooperating during the early stages of the season.
Explore the full interactive character relationship map of B'T X