This child is a mouthpiece for someone witnessing auditory hallucination (hearing hallucination).
“Why is the woman talking to herself? There’s nobody around her. She is so engrossed with speaking to people who I can’t see. My Mommy says she is sick in her head. If I hear voices too, I would be sick in my head. I’m lonely but I don’t want to talk to imaginary friends. I don’t want people seeing me talking to invisible friends. They would be frightened of me. They would run away from me. maybe some people would laugh at me for being sick in my head.”