Geki Hyuuma operates as an operations advisor for GGG (Gutsy Geoid Guard/Gutsy Galaxy Guard). He presents a macho image with his signature green mohawk hairstyle, tanned skin, and muscular build, frequently sporting sleeveless attire. Hyuuma actively engages in the field alongside his advisory duties, readily confronting threats head-on without hesitation.

A notable habit under stress is his tendency to break communication transceivers, prompting him to carry multiple spares within his vest during operations. His combat philosophy prioritizes direct physical confrontation, showcasing a fearless approach to battling adversaries on foot. These core personality traits served as the foundational basis for the Super AI within the mechanoid Goldymarg.

Hyuuma's background includes service in the covert unit ID5, where he utilized specialized combat gear called the ID Suit. This suit featured a distinctive head fin known as the Mohikan Scragger, visually reminiscent of the Eye Slugger weapon used by the fictional character Ultraseven.

His operational involvement persists through subsequent conflicts against the Zonders, BioNet, and the 11 Planetary Masters of Sol. Hyuuma remains affiliated with GGG during its transition to the Gutsy Galaxy Guard and its off-planet relocation following the United Nations' exile order.