 What is Peggy's importance to the mission?
At midday some few of the blue sun's rays filtered through to the jungle floor, but now, late afternoon on the planet, the shadows were long and gloomy. Beyond, nose high, stood the silver scout ship that had brought the advance exploratory party of scientists and technicians to Waiamea three days before. Peggy, arriving tomorrow with the other colonists, the wives and kids! A pretty girl, Peggy, the girl he'd married just three weeks ago. Crazy maybe, but Peggy and her green eyes that changed color with the light, with her soft brown hair, and her happy smile, had ended thirty years of loneliness and had, at last, given him a reason for living.
 She is Alan's motivation for making it out alive.
 She is Alan's motivation for making it out alive.  She is the one who successfully shuts down the robots.  She is a medical officer on board the larger ship.  She is Pete's wife and helped him design the robots.