Arrow has forgotten that the men on the hill are also human, so she considers them incapable of appreciating civilized or beautiful things. As she herself listens to the music, she considers what marks someone as “deserving to die.” By Arrow’s own metric, she also deserves to die because she has killed many people. While before Arrow saw her violence as righteous because it was in reaction to the violence of the men on the hill, this mission with the cellist reminds her that all violence is fundamentally against the values of civilization.