Lucky rested on Jannzi's lap as the newly-advanced expert candidate sat up on a bed in a guarded infirmary room. She looked visibly drained since the last time Ves saw her. She spent nearly all of the energy in her body and looked like she would fall asleep at any moment.
When Ves inspected Jannzi with his spiritual vision, he noted that a force of will had already formed within her mental space. The only difference from actual expert pilots such as Venerable Foster and Venerable Pelican was that her force of will was very weak and mostly contained within her mind.
Ves knew that until she broke past a barrier in her mind, she wouldn't be able to affect reality. The reason why expert mechs could display their might was because an expert pilot's force of will was able to extend out of their minds to resonate with their mechs.