Perhaps the setting is a key element. If it's related to soldiers, it could be set in a military base or a war - torn area. This setting would influence the events and the characters' actions. Also, the character of Calpernia herself is surely a key element. Her personality, her dreams, and her reactions to the situations around her would be important parts of the story.
I'm not entirely sure which specific 'Calpernia Soldier's Girl' story you're referring to. There could be many different stories with that name. It would be helpful if you could provide more context or clarify what kind of story it is, like if it's a book, a movie, or a personal account.
One key element is the loneliness of the main character. Just like Lars in the movie, the real - life person was probably very lonely and found solace in the doll. Another element is the reaction of the community. In the real story, the people around must have had different reactions to this strange relationship, which is also shown in the movie with the townsfolk gradually accepting Lars.
Another theme could be courage. The girl might show courage in waiting for the soldier and facing the uncertainties of his military life.
One key element is the captivity. The girl was held in a basement, which was a place of confinement. Another is the abuse she endured, both physically and mentally. Also, the isolation from the outside world was a significant part of it.
In the real story of the minefield girl, a crucial element is likely to be knowledge or guidance. If she manages to get through the minefield safely, she might have some prior knowledge about mines, like how to identify their locations or how to avoid triggering them. Also, the environment around the minefield, such as the terrain and the presence of any landmarks, could be an important element.
The key elements include their unique speech. They used words like 'like' constantly, which became a signature of the Valley Girl. Also, their fashion sense with things like big hair, shoulder pads, and lots of pastel colors. Another key element was their social scene, which was mainly centered around shopping at the mall, going to parties, and hanging out with their girlfriends.
One key element could be the location where she got lost. If it was in a desolate area like a desert or a mountain, the environment would play a major role in her story. Another element is her skills and resources. For example, if she knew how to build a fire or find water, it would impact her survival chances.
Since I don't know the exact story, I can't say for sure. But generally, in such stories, the girl would be a key element. The basement itself - its location, how it was accessed, and its condition - could also be important. And if there are other people involved, like the person who put her there or those who found her, they are also elements.
The key elements are the snow girl herself, the old couple who created her, and the snow from which she was made.
One key element is the marsh environment itself. It shapes her life, from the food she eats to the shelter she has. Another is her relationship with nature. It's likely very close and symbiotic.