Evelyn discovered soon enough that her previous conjecture of the red-haired lady being the creator of the 'Searing Soul' was correct, and she witnessed the woman's thought process when developing the technique first hand.
"As the very core of your being, the soul is the strongest and yet the most fragile part of yourself that you can deploy in battle. Its strength lies in its ability to damage the opponent to the greatest extent with the least possible effort, while its fragility stems from the lack of disposability it has compared to the other aspects."
The lady often talked to herself while staying alone in this room, and rectified her conjectures from time to time, fine-tuning her technique to another level.
Evelyn noticed that she could not observe more than a few minutes of each day before the 'memory' would shift forward, and she couldn't pick what parts she viewed, either.
