* The societal expectations of women: This is perhaps the strongest "antagonist." The expectations placed on women in the 1940s, limiting their opportunities and defining their roles, create the primary conflict for Melody. This isn't a person, but a system working against her.
* Melody's own self-doubt: Her internal struggles with confidence and feeling inadequate also act as a significant obstacle, hindering her progress and happiness.
* Specific individuals who represent the system: Certain characters, like some of her teachers or peers who reinforce traditional gender roles, might be considered minor antagonists. They don't actively plot against Melody but actively impede her journey.
Therefore, there's no single "villain." The antagonist is a more diffuse force composed of societal norms and Melody's internal conflict.