She couldn't observe the actions of the soul using her Tier 4 Skill. Maybe if she were to activate her Tier 5 Skill, she could glean some info by observing the working of his psyche. In this regard, her Tier 5 Skill functioned better than Deific Inference at the same Tier.
She observed each change the Caterpillar experienced, its speed of eating, the expression it sported on its face, and the variations it exhibited. She then observed Jyorta's mental state, using the small changes in his facial muscles, the movement of his eyes, his breathing rate, the amount he inhaled and exhaled, etc. to form some hypothesis.
'Using a mysterious method, he is able to control his behaviour. No, it seems to be a change in his essence. The variation is initiated in his character.' Atika Light's pupils dilated, expressing her shock. She controlled her emotions within an instant, thanks to her abundant life experience.