She is a ghost, now. She was Isaac’s beloved younger sister, Rose. Whatever strange magic this planet possesses, it has kept her spirit very much alive here on Oasis. She appears to Isaac as a kind of spirit guide, teaching him the rules of this strange new place. It is Rose, or the ghost of Rose, who leaves her glasses for Isaac when he plunges into the sandstorm, allowing him to “see” the shelter of the stone ruin called “Concrete Park”. She leads him there to confront his destiny and to speak with the departed spirits of Oasis.