|Full Name: Gai Yuuki|
|Ranger Designation: Black Condor|
|Weapons: Bird Blaster, Bringer Sword, Beak Smasher, Wing Gauntlet|
|Gear: Cross Changer, Corresponder|
|Special Attacks: Condor Finish, Flying Kick, Condor/Owl Towering Attack|
|Jet Machine: Jet Condor|
|Gai was born December 6, 1965. Gai was a confrontational and obnoxious loner who hates being ordered around. He adored to fight. 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 interests include motorcycle, saxophone, gambling and womanizing. He loved the scotch whisky Macallan. He hates men and natto, fermented soybeans. Gai's fighting style is a street fighting and martial arts mix. His combat skills match Ryuu's, though he's the dirty type, as sometimes grabs his foe in the crotch to perform an overhead lift and toss. He initially clashed with Ryuu but that clash gave Ryuu 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 appealed 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 no results and he ended up suffering from the frustration of his unanswered feelings. Slowly, he began to put himself at risk to protect her, and it quickly became an addiction. One particular time he took a shot from a deadly Empress Juuza, and soon found crystals bursting from his flesh. Eventually he believed he was dying, and fled from his fellow Jetman. Kaori eventually found him. He was trying to be brave, but the agony got the better of him. Then when he thought he could feel himself changing, he swore his love to Kaori, then tried to flee beyond her sight. She had to watch him turn into a giant crystal. When Kaori managed to destroy Empress Juuza's source jewel, everyone it had turned to crystal returned to their human state, and Gai was able to come, just in time to help his team-mates completely defeat the Vyram.
A second time he nearly died for her, and Kaori admitted to herself as well as him that she loved him as well. They became an item, but not for terribly long. For all his obsession with her, and all the good qualities both had, they were very unsuited from each other. Gai broke up with Kaori when she tried to make him over as a businessman for meeting her parents, rather than him getting to be presented as himself. While he and Kaori were still together, Gai had learned about Ryu's fiancee, Rie, and had to watch a man he'd come to believe in fall to pieces. He finally accepted being depended on by his teammates, even though he resisted being what people forced in to be all his life. Eventually Gai met his rival Grey in one-on-one challenge, and after a severe battle, a lucky shot saved him. Honoring his opponent's request for a last smoke, he lit the cigar Gure carried. Then he came just when he was needed, and together with his teammates defeated the last of the Vyram, Radiguet. Three years later, buying flowers for his beloved friends' wedding, he stopped a mugger and was stabbed apparently to death. Believing he was going to die, this time he did not hide from his friends, but made it to their wedding too late for the ceremony. He met Ryuu and wished him well, gave Kaori his blessings from a distance, as he was too weak to get up and smoked a bit of cigarette before dying.