What is the most likely reason the flower girl has remained unnamed for the entire act?

The flower girl remains unnamed throughout the act to emphasize her role as a symbol rather than an individual character. This anonymity allows her to represent broader themes, such as innocence and the transient nature of beauty, making her a poignant figure in the narrative. Additionally, her lack of a name may highlight the social dynamics at play, underscoring the disparity between her humble position and the more prominent characters in the story.