Morgana asked her maid to get the whereabouts of the prince, the news took some time to reach her as Valerian had gone out in an extreme flurry. Even some of the guards could not keep up with him. Priscilla was the one who 'found' his position and relayed the news.
Morgana decided to take the trip and talk with the prince, it was not because she had any ulterior motives but because she was very moved by the similarities pointed out by this boy a night before. She thought he was someone who could understand her state of mind.
...
Valerian was sitting on the city wall, a few soldiers were patrolling the place and a captain-level officer was standing beside the prince. The person was not here out of any protocol, he came here because the prince must have a guard beside him in case of emergency. This was an unspoken rule among the city guards, that every time a royal visited the city wall, they must have a guard beside them at all times.