On the return trip to Ragna, Windermere's declaration of war against the Unified Government left the people aboard the two ships with entirely different thoughts. Xiao Ran and Kane also discussed many more details during the journey back.
After returning to Ragna, the first thing Xiao Ran did was arrange for one of the New MACROSS-class Battleships stationed above Ragna to send both Shanamias, both Lacuses, and the child Artemis back to the Fleet. But they were not merely returning to the Fleet—they would be leaving this Fleet World for the OG World.
Mwu and Sheryl remained behind. As the captain of the Burning Legion, Mwu naturally could not leave at a time when war might break out at any moment. Sheryl, meanwhile, was the Legion's true special anti-military weapon. Not only could the power of her singing resist Windermere's singer, but it was also even more effective than the Valkyries at suppressing Berserk Syndrome. Naturally, she would not be leaving either.
Saki Maski and Miyoshi Meiya, one a secretary and the other a guard, would remain as well. The former possessed physical abilities unlike those of an ordinary human and was one of Xiao Ran's closest confidantes. The latter was Sheryl's guard and held an official military post. Neither had any reason to leave.
With absolute power on his side, Xiao Ran's arrangements already showed that he took Windermere's threat seriously enough. Once the forces mobilized from the other worlds had assembled, he would directly begin suppressing Windermere.
With his current manpower being somewhat limited, Xiao Ran did indeed possess the ability to suppress the entire Kingdom of Windermere. He could even suppress every planet connected to Windermere throughout the Brishigaman Cluster one by one. But after doing so, he would not have enough personnel to maintain order afterward.