Gao Mikado stands as the central protagonist across multiple series, driven by a powerful sense of justice and dedication to protecting others. He trained in Mikado-style Aiki-jujutsu at his family dojo under his mother. Profoundly influenced by his late older brother, Yota Mikado, creator of the "Mighty Sun Fighter" comic, Gao adopted this heroic identity as his own, marked by his catchphrase and ritual of inverting his coat to reveal a sun symbol. An early obsession with winning during martial arts training led Gao to reckless actions causing harm, instilling lasting guilt. This shapes his Buddyfighting philosophy, where he consciously avoids fixating on victory to prevent destructive tendencies. His personality blends unwavering optimism and forgiveness with a volatile temper emerging under extreme stress, sometimes triggering aggressive or reckless behavior. While he deeply values friendship and believes Buddyfighting resolves conflicts, this trust can become a vulnerability against adversaries. Gao possesses martial arts combat skills and unique powers linked to mysterious cat-like eyes, enabling him to evolve Impact cards, though evolved cards revert when given away. His Future Force ability materializes Buddyfight cards into reality, initially activating involuntarily during danger or rage with subsequent memory loss; he later learns conscious control. Additional transformations include Dragon Force of Anger (unlocked witnessing Bal Dragon's suffering), Dragon Force "Style of Impact," Draconification, and Future Force DX—a combination of all forms. His Buddy Skill manifests a golden hoverboard for flight alongside his buddies. His journey involves bonding with key buddy monsters: Drum Bunker Dragon (Fang Slade Terrestrial XIV), whose temporary departure for training caused Gao to lose interest in Buddyfighting; Dragon of the Sun, Bal Dragon (later revealed as Super Sun Dragon, Balle Soleil); and Demon Lord Dragon Batzz (Barlbatzz Dragoroyale the First), leader of Dragon World's Thunder Empire. Each significantly influences his deck strategies across different worlds and tournaments like the ABC Cup and Gaen Cup. Significant developments include confronting the Disaster group, where his Future Force destroyed their base; joining Hundred's Buddy Police to combat rogue monsters; experiencing his first canonical loss to Ikazuchi, triggering temporary retirement; and mastering dangerous forms like Draconification at personal risk. Later life sees him marry Paruko Nanana, father Yuga and Haru Mikado, and eventually move to America, concluding his central role before Buddyfight Ace. Persistent weaknesses encompass his volatile anger, impulsiveness leading to unintended consequences, and over-trusting nature. Despite heroic actions, escalating skills sometimes negatively impact friends like Drum and Kiri Hyoryu, prompting their temporary departures due to self-doubt.