Yes, Camila is in the Grand Master rank. A student who is on the same level as the teachers of the Academy and already a person who could be considered a power in the world.
A person who enters the Grand Master Rank is incredibly stronger than the Masters, the previous rank. Because of the greater ease of controlling Mana and creating things with it.
Theos knew that if he faced Camila, even though she had just entered that rank, he wasn't sure he would beat her, especially with the many tricks she hid about the dragon race and because of her great combat experience... Plus that heroine power they all have.
"How do you know about the Dragon Kingdom?" she asked after recovering from the initial shock.
Now she was a bit helpless, she had become significantly agitated, taken by surprise.