The second pilot of Getter Robo, Hayato is portrayed as a psychopathic yet highly intelligent delinquent. He is first seen as the leader of a student revolutionary group but is captured by the Saotome Research Institute after a fight with Ryoma and pulled into the Getter Robo storyline, initially as the pilot of Getter-2. He is the only character to have appeared in every Getter Robo series and has fulfilled many roles, from being a regular teenager to an adult colonel and an aging scientist.

Like the other Getter Robo characters, his portrayal is drastically different in the 1970s TV series. While still a rebel and a loner, he is far less cold and cruel.