Impossible
Aina struggled with all her might.
By now, she had a grasp of what the ability of this Invalid was. It was clearly a puppeteering ability and this ability was unfortunately especially effective against those with weak Soul Forces like her own.
However, that didn't mean that she didn't have a chance. She had been struggling from the very beginning, there was simply no way that the stamina of this Variant Invalid was endless. There had to be a limit to how long it could hold control over her.
Due to her experience in the Joan Zone, Aina had learned a lot of Joan's death. Even if there was just a single thing the experience taught her, it was that it took far more energy to control a person than it took to wrest control away.
Aina knew that all she had to do was to keep struggling, to keep playing the part of helpless damsel, only then might the Invalid foolishly continue to chip away at its own stamina.