Who expresses the sentiment about the indifference of pretending not to care?

The sentiment about the indifference of pretending not to care is expressed by Irene. Throughout the narrative of GATTACA, Irene embodies the struggle of individuals living under a genetically engineered societal structure. Her character wrestles with feelings of love, aspirations, and the limitations placed on her by genetic expectations. When she discusses the idea of indifference, it reflects a deeper commentary on the façade people maintain to protect themselves from disappointment and rejection in a world where one's genetic makeup dictates their value and potential.

Irene's perspective highlights the emotional toll that such societal pressures can take, emphasizing the human experience of navigating identity and self-worth amidst overwhelming expectations. This sentiment resonates particularly in the setting of GATTACA, where the desire to appear unaffected is juxtaposed with the characters' deep-seated fears and desires.