Although the incident with Yuzes occurred during the trip to the Federation, it did not affect Xiao Ran's normal itinerary there or his subsequent arrangements. After Yuzes's secret base was handed over to Revil and Durandal, the takeover proceeded in an orderly fashion.
After leaving the Federation, Xiao Ran followed his original itinerary and went to DC, where he specifically asked Bian Zoldak about Shirakawa Shuu. According to Bian, Shirakawa Shuu had returned during the Zovok Rebellion, but after seeing that the situation was fully under control, he left again for an unknown destination. However, it was likely related to the newly emerged Demon Robots and Super Robots.
Xiao Ran had always wanted to have a proper talk with Shirakawa Shuu, so he could only express his regret. Shirakawa Shuu also wished to protect Earth, but he was someone unwilling to be bound by anyone. Under certain special circumstances, he was willing to follow others' orders and do certain things, such as when Earth was under threat. But under normal circumstances, that mysterious fellow would never stay obediently in one place. Thus, Xiao Ran had never considered bringing him into the Earth Defense Force. At most, he could be considered an unaffiliated member of the Steel Dragon Squad.
Xiao Ran also remained in DC for three days and inspected its current state. After the series of incidents, DC had now begun moving entirely toward scientific research. Its political system was completely different from the Federation's, somewhat like a monarchy centered on scientific research. Naturally, its territory was nowhere near as large as the Federation's.
After telling Bian about Yuzes, Bian was thankful that they had managed to capture him early. Otherwise, if Yuzes had been allowed to develop within the Federation, he would not have needed much time. Another three