Leader of the Cybertrons, Star Saber belongs to the subgroup known as the Brainmasters. He is also an excellent swordsman and he is very protective of his adopted human son, Jean, though not protective enough to forbid him from running around the battlefield without any armor or defensive weaponry.
In either jet or robot mode, Star Saber is capable of linking up with Victory Leo to become Victory Saber. In this form, Star Saber's speed and power are greatly enhanced, but at times, Victory Leo's savage personality can override his calm and collected nature.
His catchphrase is "Let's say go!", possibly a pun on "Let's seigō" (整合), meaning "Let's coordinate/integrate."
Star Saber is apparently nigh-legendary and is considered the greatest swordsman in the universe.
As Supreme Commander, Star Saber has come to Earth in order to track down Deathsaurus, who has become the number one threat to space. Meanwhile, God Ginrai and his forces (which include the Godmasters), battle against Overlord and his troops. Deathsaurus is pleased by the fact that Star Saber himself has had to come to face him, as it is acknowledgment that he is now the most dangerous Decepticon alive. He is also eager to settle scores with Star Saber, and it is clear that there is bad blood between the two. In their earlier battles, Star Saber is able to fight off Deathsaurus with relative ease, even though Deathsaurus himself rarely dirties his hands.
It is revealed later that when Star Saber was simply a commander (as opposed to Supreme Commander), he learned that Deathsaurus had constructed a gigantic space fortress in his bid to be named Emperor of Destruction. Leading an Autobot army, Star Saber engaged Deathsaurus's forces in deep space in a violent battle. While the armies fought, Autobot strike teams sabotaged the fortress, draining it of energy and causing it to fall into the Dark Nebula.
Star Saber and his Autobot forces are successful for much of 2025, but eventually, the Decepticons start inflicting hard blows. One of the first is struck by the Breastforce, who reveal their combined form of Liokaiser and damage Star Saber before being driven off by God Ginrai and the threat of further Autobot reinforcements. Their attack leaves Star Saber barely able to stand after the fight. Shortly thereafter, Deathsaurus, roused to fighting fury by the memory of his fortress's defeat, battles and nearly kills Star Saber. Star Saber is only saved by the fact that Deathsaurus has already expended much of his energy trying to reactivate his fortress, forcing the Decepticon to retreat. An ambush led by Deathsaurus not long after severely wounds Star Saber and mortally cripples God Ginrai. Despite God Ginrai's rebirth into Victory Leo, it is a severe blow to Autobot morale, and the unstable Victory Leo has to prove himself to the others. The final blow results in the successful capture of enough energy to reactivate the Decepticon space fortress.
After Deathsaurus abandons the blindly loyal Dinoforce, the bitter Dinoforce commander informs the Autobots about the fortress's weak point. Star Saber leads an assault on the mighty vessel and defeats his arch-enemy Deathsaurus in a final duel. The fortress is destroyed by the Autobots after a hard-fought battle, and Deathsaurus curses Star Saber before vanishing into the very Dark Nebula from which he'd fought so hard to free his fortress.
While initially appearing to have been consumed by the fortress's destruction, Star Saber and Victory Leo emerge from its ashes, victorious as their name.
During the final battle, as Deathsaurus's fortress attacks the Earth, it is Deathsaurus himself, not Liokaiser, who battles Star Saber in space. Leozack, then, is able to take his treachery to the ultimate extreme by turning the fortress's power on Deathsaurus, and Deathsaurus cripples the craft with his cannon as Star Saber takes Leozack down. Then the wounded Deathsaurus reveals the true reason he has quested to liberate the fortress from the Dark Nebula: It is home to the Decepticons' families and civilians. As the shocked Autobots discover this, Deathsaurus's wife, Esmeryl, Leozack's sister and the Dinoforce's children appear. Deathsaurus and Star Saber then make peace, shaking hands and vowing to work together for the betterment of the Transformer race.
- Voice actor: Hideyuki Tanaka (Japan)
- When Star Saber first deactivated Deathsaurus's space city he knew exactly how to disable it. When it was activated a second time, he didn't seem to have even the slightest clue how to stop it.