General Tetsuzan Kurama
The chief of the special science office of the National Defense Ministry who established the Fever team. He is a master of traditional Japanese swordsmanship.
Keiko Nakahara
One of the operatives that runs Big Baser.
Masaru Nakahara
Keiko's little brother.
Tomoko Ueda
The other operative that runs Big Baser.
Yuki Ueda
Tomoko's little sister. Was used by Egos in episode 27 to find Battle Fever's base.
Robot mynah bird built by Tetsuzan as a present. Often had insight into the situation. Revealed in episode 51 to have a freezing ray built in.