Final answer:
The emotion Will is not experiencing is guilt; the texts suggest sleep struggles and intense emotions but not guilt for sleeping through a traumatic event.
Step-by-step explanation:
When Will looks in the mirror on page 65, the emotion he is not experiencing is guilt. The excerpts provided suggest that the characters in the given texts are dealing with intense emotions and often overwhelming situations which impede sleep or lead to complex emotional states upon waking. These characters demonstrate distress, but there is no direct reference to feeling guilty for sleeping, especially in the case of a recent traumatic event like the death of a brother. The characters are more likely to experience grief, disorientation, or anguish. The complexities of sleep, dreams, and the emotions they evoke are underscored by the experiences of these characters, who struggle with their internal turmoil and external realities.