Immediately described as “very self-possessed,” Vera is an observant, clever, and above all imaginative young woman who handily fools the adults around her with “romance on short notice.” Vera's name comes from the Latin for truth, and her innocent demeanor makes her tales all the more convincing.
The effect that the use of the words "symphony", "crescendo", and "movement" have on the overall meaning of the poem is that it appeals to the senses of the reader to create a mental image.