Getter Robo Go
- Go Ichimonji (一文字 號, ichimonji gō?, played by Takeshi Kusao): The 17-year-old main pilot of the Getter.
- Sho Tachibana (橘 翔, tachibana shō?, played by Yuko Kobayashi): The 16-year-old daughter of Doctor Tachibana and sister of Shinichi. After her brother dies and the Getter is improved, she becomes another pilot of the robot.
- Gai Daido (大道 剴, daidō gai?, played by Akira Kamiya): The third pilot of the Getter. A 17-year-old man, he is the most prudent and conscious of the three. Before becoming a pilot of the robot, he was the pilot of one of the helicopters which helped the robot.
- Doctor Tachibana (橘博士, tachibana-hakase?, played by Ichiro Nagai): The head coordinator of the Getter Robot project and father of Sho and Shinichi. At first, he is reluctant to use Getter Robot as a weapon until his son dies.
- Shinichi Tachibana (橘 信一, tachibana shinichi?, played by Toshio Furukawa): The son of Doctor Tachibana and brother of Sho. A helicopter pilot of the Getter squadron. In order to help Getter defeat a Metal Beast, he sacrifices himself. It is his death which prompts Doctor Tachibana to change the robot into a combat weapon capable of transforming in different forms.
- Yuji Muto (武藤 由自, mutō yūji?, played by Junichi Kanemaru): The informatics and programmer expert of the Getter squadron, who works mainly at the base of the NISAR. He is also the pilot of the flying ship which transports the Getter Robot after its battles.
- Lee Foa May (リー・フォア・メイ, rī foa mei?, played by Eriko Hara): A nurse at the NISAR who treats the pilos and has a special relationship with Go.
- Dr. Pochi (Dr.ポチ?, played by Masaharu Sato) & Dr. Tama (Dr.タマ?, played by Isamu Tanonaka): The assistants of Doctor Tachibana and the main comic relief of the series.
- Doctor Yoshii (吉井博士, yoshii-hakase?, played by Kohei Miyauchi): A scientist who collaborates in the Getter project.
- Remi Yoshii (吉井レミ?, played by Miyako Endo): The son of Doctor Yoshii.
- Akira Daido (大道 哲, daidō akira?, played by Chie Sato): The younger brother of Dai.
- Okada (岡田?, played by Yuki Sato): One of the candidates to become a pilot of Getter.
- Nakano (中野?, played by Taiki Matsuno): One of the main mechanics in the NISAR base
- Professor Randow (プロフェッサー・ランドウ, purofessā randō?, played by Daisuke Gori): A preeminent scientist in robotic engineering who wishes to conquer the world.
- Baron Yasha (ヤシャ男爵, yasha-danshaku?, played by Masaharu Sato (older brother) and Michihiro Ikemizu (younger brother)): A strange being which has a body with two heads, one blue and one red.
- Count Rasetsu (ラセツ伯爵, rasetsu-hakushaku?, played by Michiko Abe (female) and Ichiro Nagai (male)): A servant of Professor Randow and a cloned being. It often is at odds with Baron Yasha for Yasha's lack of ability in battle. It has a male face in its breast.
- Viscount Narukisu (ナルキス子爵, narukisu-shishaku?, played by Ryo Horikawa)
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