Kapitel 1913: The Imposter.

One major thing that they noticed over time was that not all the strange creatures possessed a spark of consciousness at all times.

All of the strange creatures could possess the spark of consciousness, but only one at a time and only when they were about to cross the barrier between the spiritual dimension and the void universe. 

So even though she could change bodies easily, they still managed to trap her. In fact, it is the body that she is inhabiting that they are wary of, not her. As for her, they don't think much of her. 

She wasn't perturbed by Legion-1's belittling of her. She said confidently, "Let me introduce myself. I am your ancestor, Green Vine."

Legion-1 rolled his eyes and said, "Another fool who thinks they are someone else."

Legion-7 asked with genuine concern, "Did the first sage mess with your memory too? I didn't think that something like that was possible for a person with a spark of consciousness."