You have to say that this confidence makes those two maids quite surprised. Even though they did not release their full pressure but they still release some of their pressure and normally any special grade Warrior won't be able to tolerate that pressure. Even if they try to not show any discomfort, one thing is that this sudden pressure will make them scared. But unfortunately for both of these people they did not see any fear. They solve the exactly opposite thing: confidence.
'Why is he so confident?' You can say that both of these maids are now thinking of that question. Actually both of them were battle maids that the king selected for her daughter. Previously because Livia was very close to losing her life the king decided to appoint these two battle maids.