Final answer:
The characters in the excerpts are uncomfortable due to actions such as Alcée's behavior, Aylmer's obsession, and Gauguin's presence, which cause emotional distress and physical reactions.
Step-by-step explanation:
From the provided excerpts, it's clear that these characters experience discomfort and distress caused by the actions or emotional states of others. Sebastien is not directly mentioned; however, by analyzing the context, the actions that made characters uncomfortable include Alcée's intrusive behavior that provokes a disdainful reaction, Aylmer's obsession with the birthmark causing Georgiana to faint, and Gauguin's unsettling presence inciting fear in Tehura. The sense of unease is illustrated through descriptions of weeping, expressions of sadness, implied aggression, and physical reactions like fainting—each revealing the characters' emotional turmoil and vulnerability.