Luna shows herself as a butterfly because she needs to free herself from the "cocoons" that hold her. This metaphor extends throughout the book, as it takes her to muster up the courage to open these cocoons throughout the story.
What are the cocoons that hold Luna?
- The family.
- The society.
- The insecurity.
- The fear.
- The lack of courage.
Luna is a transgender girl who is still finalizing her transition to the female gender. This transition is what allows her to be compared to a butterfly, through metaphors that show that in addition to transition, she must break her cocoons, that is, leave behind everything that prevents her from being free.
More information about metaphors is on the link:
https://brainly.com/question/1291942