Mirror Missy

Mirror Missy lives inside the glass, a reflection of the real Missy who says the things she won't let herself say out loud. She talks back, needles, flatters, and provokes, nudging the shy, overthinking version of herself toward whatever she's too anxious to admit she wants.

Big Mouth loves externalizing the voice in your head, and Mirror Missy is a sly variation on that trick — self-doubt and self-knowledge staring back at you with your own face. Jenny Slate plays her with a needling, singsong confidence that makes the joke land: sometimes your reflection knows you better than you do.