Aside from those highly centralized civilizations, every society—including the Erem Elves—had opposition parties and various dissenting groups. These groups were not necessarily extreme or evil. Many of them had good intentions, but were unable to reconcile their ideas with those of the rulers due to the limitations of reality. The situation in the Erem Kingdom was actually fairly good. Compared with many Mortal Civilizations, they were quite united. Even though there were dissenters, they shared the same general goal of "defending Erem Civilization." It was precisely this shared goal that allowed the Utopia Organization to gather so many elves who were unwilling to migrate.
Put simply, they were merely overly wary of this pie falling from the sky. It was only human nature, and understandable. If a group of aliens suddenly appeared on Earth one day, holding out an elixir of immortality and claiming they wanted to distribute it worldwide for free, there would certainly be a bunch of people refusing to take it. So Hilda did not use force against the elves who disagreed with her. Instead, she used the special agents she had cultivated, along with a little public-opinion and political maneuvering, to gather all the opposition on Darklight Island.
It was the same principle as "please conduct your protest at the designated location" on Earth, except that things were happening on a somewhat larger scale here in Erem.
Hilda planned to leave the opposition alone for the time being, then use the facts to convince them to cooperate after most of the elves had completed their migration. However, 883, who was blunt by nature, clearly felt that this refined "queenly approach" was wasting time. He pointed at the plant-person named Kepler (and the term really was accurate) and introduced him: "This is Kepler, a Wood Elf. We've