The planet Karaltine is the Throneworld of the Crown Imperia and was ruled by Prince Gavyn aka Starman. The royal family rule over twenty-four other worlds of the empire from the capital planet.
The planet was an important ally of Rann in the war against Thanagar. But a treacherous attack of Lady Styx and her deadly army, destroyed the Empire, decimating the populace and making the survivors slaves. Prince Gavyn blamed Adam Strange for this attack because he teleported Bizarro to attack Synnar, leaving the planet without enough force to defend themselves against Lady Styx. This tragedy created a dangerous animosity between both heroes.
But in the last battle for Rann's survival, Prince Gavyn forgave Adam Strange and aided the rest of the army against the Thanagarians and Lady Styx's army. When they destroyed the Demiurge and also Rann, all the Rannians were teleported to Throneworld. Gavyn saw in this a fresh new start for the Rannians but also for a desolated planet, and offered them to make Throneworld their new home. The planet was renamed New Rann.