The free time granted by Captain Erbair allowed Khan to train a lot and stay with Liiza without affecting his sleeping schedule. Still, he ended up being the only one who decided to attend the three afternoon lessons necessary to become an ambassador.
The event naturally surprised Paul since Khan had previously requested more free time, but he never got the chance to question him during the week after the hunt.
Khan was a ghost inside the camp. He appeared only to attend the three lessons concerning xenolinguistics, politics, and alien customs, but he left right after them. The other recruits didn't even bother to attend those classes after the hunt, so no one had the chance to talk with him.
Khan completely disappeared during the free days. He stashed provisions in his backpack before spending his entire time among the mountains. The cold accompanied his training and his moments with Liiza, but he barely felt it anymore.