William clearly hadn't fallen into Jeffrey's mental illusion, but he pretended as if he had.
Especially Jeffrey, upon witnessing William's strength, originally thought he was just a novice Soulmancer. Yet William easily broke through Jeffrey's mental illusion. This ability seemed to hide some secret. For a moment, Jeffrey couldn't fully comprehend William's true capabilities.
As long as Alice didn't flee, Jeffrey believed he could continue the standoff. He was confident that the 13th Bureau would soon notice the anomaly and arrive shortly.
Meanwhile, William stood quietly, motionless, making Jeffrey hesitant to act rashly against him.
Alice, however, was completely trapped in Jeffrey's mental illusion, unable to extricate herself.
Unaware that her soul was bound, she clearly felt the changes in her surroundings.