Dialogue is a literary technique which allows the reader to hear from perspectives other that the author's or main character’s by employing two or more characters to be engaged in conversation with one another. The best known use of dialogue is in Plato’s “Republic” in which dialogue is used for rhetorical and argumentative purpose.
Es lenguaje figurado porque cuando ella entra la habitacion, la habitación no se esta luminando literalmente. Es solo una forma de lenguaje figurado para mostrar que bueno se siente cuando ella llega.