Mind

[Chapter 233 Comments.]

[Keltic_Spirit: I'm a slight bit lost on how the ability manifests. Is it: a. An overlay on their sight like Rem sleep but conscious and open eye. b. Applying an illusion over a specific person by taking out their memories to form a 'dream'.]

"Well, it's an ability to induce a dream in a person. It can be in the form of all kinds of dreams, like lucid dreams, nightmares, and other things. You can think of it as an illusion in the form of a dream, but they're not sleeping.

"And since it's a dream, I'm taking advantage of their own memories to form those dreams and manipulate them. This way, I can somehow control their movement," Theo replied while turning around, focusing on the captured humans.

The first one would be the three captured males. 

Their dream showed how Theo actually came across them and destroyed the cage.