It's very simple: The theme is that the story has artistic freedom as the bird bows to her n it can't sing properly when it was caged . Then comes jealousy as her other sisters become jealous of her when they compare the nightingale with their parrots n then it's the friendship n relationship.September is a young  girl with charming nature n is very freindly unlike her sisters n is very good,kind n arrogant at times
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