Prof. Hideki Tobijima is a scientist and the founder and owner of the Tobijima Pilot Team, a private aviation organization in the anime Groizer X. His company operates from a base on Akanejima, an isolated island in Tokyo Bay, and after the arrival of the alien defector Rita and the robot Groizer X, the facility comes under the supervision of the National Security Bureau and becomes a key stronghold in the defense of Earth. Tobijima is a brilliant researcher who has devoted his career to advanced technology, particularly in the field of robotics, and he plays a central role in the development, maintenance, and operation of the transforming combat robot Groizer X. He is portrayed as a highly intelligent and determined individual, known for his technical expertise, his strategic thinking, and his dedication to opposing evil. His work is driven by a desire to create machines that can help humanity and protect people from the alien threat. Toward the younger members of the team he acts as a mentor, firm but gentle, offering guidance and support to the main pilot throughout the conflict. He is a respected figure among his colleagues and within the scientific community, and military authorities rely on his knowledge and judgment as the war against the invaders unfolds. Beneath his composed and analytical manner, he is a layered character who carries the emotional weight of a personal loss from his past, which adds depth to his otherwise disciplined personality. His notable strengths are his scientific brilliance, his logical approach to problem solving, and his ability to develop and adapt the technology needed to counter the threats his team faces.