Cosette

Cosette is Paige's friend. She's also not real.

A figment of her imagination that Paige's head made up out of isolation, Cosette has a tendency to appear in the middle of the night as a figure of support, and a mirror of herself, essentially. She does not speak, at least traditionally. Her television head does 'talk' with contextual responses in the form of... well, television.

Tends to show Paige things she already knows, but is struggling to comprehend or accept.