Gai, a primary figure within the Stone faction, journeys solo across Teslandia focused on gathering Tokens for his group. His partnered Cyborg Warrior is Iron Minotaurus.

Gai fights in battles where Cyborg Warriors convert energy from Sanctuaries into Tokens, resources pursued by factions striving to heal Teslandia's environment. He uniquely exploits the ability to extract Tokens directly from the symbols displayed on the chests of opposing Cyborg Warriors, marking him as a pivotal player in the conflict over Token acquisition.

He emerges in the desert bordering the stone region accompanied by another enigmatic Warrior. In combat, this pair not only seizes Tokens from adversaries but also wields the capability to summon additional Warriors during engagements. His actions directly oppose protagonists like Nico, leading to clashes centered on Token collection and the awakening of Warrior abilities.