They traveled in groups for hours. Sebastian is in the front, leading the troops. Like the planned, Alekxia and her group are outside Academia, guarding it against any harm. Sebastian said it would create panic if they were seen in public; it is better to not expose themselves in front of the students. They're protecting Academia in the dark, securing the safety of everybody.
Dust signaled them to stop, and it's what they did. Even if it's already dark, Cassandra could still see the signboard with 'Restricted Area' written. They're still in the vicinity of the Academia's island, but this part was restricted to students. She even asked for the reason why but they weren't able to provide an answer. It is said that it was restricted because it's dangerous to roam around in the island's unsee
