After Morgana scolded the guy, she helped him get up the floor and then supported him back to his room. She knew what he said was true. The centurions will not allow her to grow to a level where she posed a threat to their sovereignty. However, she wanted to beat them all with conviction and her own.
On the way, Valerian did not say anything to her again, he could see the flicker of contemplation in her eyes at this moment, and this was what he wanted. The more she thought about this, the more she will see that his plan was in favor for her. They were children, Valerian was able to avenge Diligentia in the past because he held the element of surprise and his enemies were not the strong people as well.