Rue

Rue is a cryptic, but significant NPC (and in the Equinox Update, a temporarily playable character) located in a room in the back alley of Refuge, to the right of the Lamplighter's house. She also features in one of the three Visions Niko can encounter during their travels.

Background
So far, little is known of Rue; only that she has connections to The Author.

At the end of the game after the Equinox update, if the player talks to Proto before speaking to anyone else, Niko asks Proto what it's like being a robot. Proto responds with "It's nice", Cedric doesn't say anything, Rue states: "That's a really hard question to answer, Niko!"

Personality
Rue, similar to Niko, is kind and caring. Usually talking to Niko in a friendly manner even though they usually don't remember her. After the Equinox Update, she is also shown to be obedient and loyal as she followed the Author's written advice despite such likely causing her loneliness.

Trivia

 * Rue's name is only found out - at minimum - in the second run (or NG+).
 * Her in-game dialogue (before the Equinox Update) changes during the first 4 runs.
 * Rue is, alongside Niko and The Author, one of the only characters to remember the player even between runs.
 * She is also the only one aside from the Author to remember the player more clearly.