OVA
Description
Shichisei Hiruma is the president of Japan's Air and Self-Defense Force and deputy commander within U-NASA's Annex Project. He stands 179 cm tall, weighs 112 kg, has brown eyes, and sports slicked-back brown hair featuring two distinctive front spikes. He consistently wears formal attire, including suits and ties.

Shichisei possesses a stern and imposing demeanor that commands respect. He maintains controlled hostility during interactions, evident in his conversation with Professor Honda. His approach to engagement is standing-oriented, though earlier accounts indicate a more fearsome disposition. Speculative analytical assessments suggest potential ESTP traits in his decision-making, focusing on immediate sensory information and practical solutions over long-term planning.

He is one of eleven siblings, including Ichiro Hiruma (BUGS 2 mission survivor and later Prime Minister of Japan) and Rokka Hiruma. During the Annex I arc (2619 A.D.), Shichisei investigated the Bugs 2 project's secrets and Annex 1's mission objectives through discussions with Professor Honda. He revealed that Annex 1 crew members received Mosaic Organ implants instead of traditional Bugs surgery. This synthetic organ, derived from Terra Formars tissue, enabled human adaptation to Martian conditions and combat capabilities against the species while allowing non-insect DNA incorporation. He detailed the organ's similarity to Bugs 2 surgery, its evolutionary implications, and addressed Honda's concerns about body mass compatibility by explaining the combined use of insect and animal bases to maintain vascular and dermal enhancements.

Organizationally, Shichisei affiliates with Ichi Security, operating as a member under section manager Kyo Hyuga. His surname "Hiruma" combines "leech" (蛭/hiru) and "space/time" (間/ma), while his given name "Shichisei" translates to "seven-star" (七星), symbolizing celestial connections.