Helen Wilson felt her body sway the moment James Brown left; the pressure the Mysterious Figure exerted on her was just too immense. She had interacted with the Mysterious Figure twice before and felt that he was quite good to her, always helping her, so she didn't have any real fear of this Mysterious Figure. In fact, she harbored a strange fondness for him.
But this time, during her longest encounter with the Mysterious Figure yet, she truly sensed the pressure emanating from him. It was bearable during their Special Ability Training, but later, when she was negotiating terms with him, she really had to force herself to hold on.