Agreeing with Rosetta's idea, they decided that their priority was clearing Vance's name, which meant they needed to have an audience with the King in the palace immediately to request for the trial. Now that there was a clash between the regions, Ethia had become a dangerous country to roam about. There was no telling when Mervin and Eldridge would start their attack, thus starting the war.
Melva was sure that the King would do nothing to help them stop it. It was a part of his game to decide who was the most compatible heir that would take over his seat in the future. He would enjoy the war. If there was no war, the King would start it himself.