Final answer:
The excerpts provided cover the central theme of emotional shifts in characters within narratives, suitable for high school English literature studies, focusing on analysis of character dynamics and plot progression.
Step-by-step explanation:
The question seems to revolve around understanding a character's emotional change in a narrative, specifically when Irene becomes aware of Joh noticing Felise, causing her smile to fade. This falls within the study of English literature, where students analyze characters, themes, and plot developments within texts.
From the provided excerpts, we can infer that such moments are characterized by a sudden shift in emotion, often triggered by an awareness or realization that alters the character's perception or mood drastically. Examples include situations where one character senses another's attentiveness to a third party, perhaps evoking feelings of jealousy, fear, or shame.