Dr. Kotaro Hazuki serves as the resident scientist and technical mastermind behind the creation of the four Cyber Beast Machines that merge into the Super Robot Dancouga. Originally the chief engineer of the Jyusenki Tai (Cyber Beast Force), he delivers vital mechanical expertise and upkeep for the team’s combat units. His responsibilities expand after General Ross Igor’s death, as he assumes command of both the Jyusenki Tai and the battleship Gandor, merging tactical leadership with his engineering prowess.

He takes on guardianship of Laura Sullivan, a child orphaned during the Muge Zorbados Empire’s invasion, revealing a compassionate dimension beneath his wartime focus. Post-conflict, he persists as a key figure in later installments like the OVA *God Bless Dancouga*, directing the team against lingering alien forces.

In the alternate continuity of the manga *Dancouga BURN - Super Beast Machine God*, a Hazuki-family figure heads the organization Zoo, supervising the new Cyber Beast Force “Burn” with the same emphasis on technological advancement and strategic command.

Across all iterations, his defining attributes—scientific ingenuity, paternal devotion, and versatile leadership—anchor the Jyusenki Tai’s operations, ensuring their technological and combat efficacy throughout multiple conflicts.