Another theme could be courage. The girl might show courage in waiting for the soldier and facing the uncertainties of his military life.
Love could be a theme. The love between the soldier and the girl, and how they maintain their relationship despite the challenges of military life.
Themes such as perseverance and courage could be in the story. The girl needs to persevere through the long periods of separation. She has to be courageous in facing the possibility of losing the soldier in combat. And there might also be a theme of patriotism, as the soldier is serving his country and the girl may support him in that noble cause.
One possible theme is sacrifice. The soldier may have to sacrifice his time with his loved one for his duty. Another theme could be loyalty, both to his country and to his partner.
One possible theme is sacrifice. Soldiers sacrifice their time with family during Christmas for the greater good.
One possible theme could be isolation. If a girl is in the basement, she is cut off from the outside world, which can lead to feelings of loneliness and fear.
The themes in the 'the real girl in the closet story' could be quite diverse. Fear is definitely a likely theme. The girl in the closet must be experiencing fear, and that fear can be a driving force in the story. Another theme could be rescue. If she is trapped, the idea of someone coming to her rescue is a common theme in such stories. Additionally, the theme of truth is important. The story would probably be about uncovering the truth about the girl's situation, whether it's related to her own actions or the actions of others that led her to be in the closet.
Another theme might be courage. It takes a great deal of courage for a girl to escape from whatever situation she was in. Whether it was an unsafe environment or a place where she was being oppressed, she had to be brave enough to take the first step towards freedom.
Another theme might be secrecy or hidden trauma. The fact that she is in the closet could represent something that is being kept hidden, perhaps an abuse or a family secret that she is a part of. It could also suggest a lack of safety and security, as the closet is not a proper or safe place to be in for a long time.
One possible theme could be the transition from a life of military combat to a pursuit of the supernatural. Another theme might be the exploration of the unknown, as the soldier leaves behind the familiar world of the military to face the mysteries of ghosts.
Survival can also be a theme. In the military environment, especially in combat situations, the soldier has to fight for his own survival. He needs to use his skills, knowledge, and instincts to stay alive. This could be a major part of the 'first soldier story', as he overcomes various threats and challenges to survive and complete his mission.