Beatrice. I know, nobody knows who it is, as far as I know. However, as the credits for Episode 3 were scrolling through, it got to the characters voiced, and the actor that voiced them. Everyone in this episode was there, but the second to last name was "Beatrice", with a voice actor who's name I don't recall at this very moment. Since we haven't seen a character named Beatrice yet, I'm assuming that that was the name of the voice on the Walkie Talkie. I know it's a wild guess, with something so little as proof, but I don't recall seeing anybody by the name of Beatrice in the episodes up til' now either.
What does everyone else think about the stranger?