Gai (born December 6, 1965) was a confrontational and obnoxious loner who hated being ordered around and adored fighting. Like the others, he was a member because he had received the power. He was not happy about it, but he did come through for the team every time. His combat skills matched those of Ryu's, though he was the dirty type, as he sometimes grabbed his foe by the crotch to perform an overhead lift and toss.

He initially clashed with Ryu, but that clash gave Ryu something solid to distract himself from the agony of Rie's death, while it gave Gai something to pretend he was there just to annoy and not because he wanted to be.

Gai fell in love with Kaori. She was appealing to him in part for her gentleness and class, for her spirit and bravery which he recognized, and also because unlike almost every woman he met, she would not be his for the taking. He flirted with her but with no results and he ended up suffering from the frustration of his unanswered feelings. The fact that Kaori had feelings for Ryu, who did not reciprocate, annoyed Gai even more. Slowly, he began to put himself at risk to protect her.