Grace has very little idea what 'interstellar' means but she's better at context than she gives herself credit for; there is a short moment of the (metaphorical) math equations floating before her face before she pieces it together and beams an unpracticed smile. ~You mean to say - aliens, little one? How splendid!~

Local Lovecraftian horror & victim has not pieced together that she's supposed to be the aliens.