Vorden is home
When the group was due to split up and about to head their separate ways, perhaps out of all of them, Vorden was the most troubled by all the different thoughts that were going through his mind that day.
There were multiple reasons for this. His whole life he had lived with his family before coming to the military academy. He never went to a public school like the others, and it was actually his first time interacting with people other than those on the island. The people he was about to leave now could in a way be called his only friends he had.
This thought saddened him, as there was a good chance that he might never see them again. Initially, he was meant to have two years of interacting with the world and other people in the military academy, but that would have been cut short by the civil war.