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.
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.
Another theme could be courage. The girl might show courage in waiting for the soldier and facing the uncertainties of his military life.
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 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.
One possible theme could be survival. If a girl was trapped in a basement, her struggle to stay alive through difficult conditions would be a significant part of the story.
One possible theme could be survival. If she's in the basement against her will or due to some difficult circumstances, her fight to stay alive would be a major theme.
One possible theme could be survival. If the girl was lost in a difficult environment, her struggle to stay alive would be a major theme.
One possible theme could be isolation. Bathrooms are often private spaces, so the girl might be experiencing a sense of being alone or cut off from the outside world. Another theme could be self - reflection, as it's a place where people often think about themselves.
One possible theme could be self - discovery. The girl in Oslo might be on a journey to find out who she really is, especially in a new and different environment like Oslo.