I think sacrifice is also a common theme. Soldiers often have to make sacrifices in the line of duty, and this could be explored in the fanfic. Another possible theme is the struggle with post - war trauma. After experiencing the horrors of war, soldiers may face mental and emotional challenges, which could be a central part of the fanfic.
The unique storylines and character development usually make it interesting. You get to see soldiers in different scenarios and challenges that might not be in the usual military tales.
Another theme is loyalty. Similar to how soldiers are loyal to their comrades and cause, in Soldier Pokemon fanfic, the trainers and their Pokemon show great loyalty to each other. They face difficulties together and never abandon one another. It's often depicted in battles where the Pokemon will fight to the death to protect their trainer and vice versa. Also, the idea of a mission or a goal is common. The trainer and their Pokemon are on a journey with a specific objective, like saving a certain Pokemon species or stopping a villainous plot, much like soldiers on a military mission.
One way to find good 'A Soldier's Calling Fanfic' is to check out reviews. If a fanfic has a lot of positive reviews, it's likely to be a good read. Also, follow some of the more active fans of the original work, as they might share links to their favorite fanfics.
One common theme is the clash of different power systems. Soldier Boy has his super - powers from his own universe, and in the Twilight world, there are vampires and werewolves with their own abilities. So, stories often explore how these different power dynamics interact.
One common theme is the relationship development between them. It could be a slow - burn romance where they start as comrades and gradually fall in love. Another theme is adventure. They might go on missions together and the story focuses on their experiences during those missions.
Another theme might be the relationship between Cissnei and the cadet. It could range from a mentorship - like relationship to something more complex and emotional. For example, the cadet might look up to Cissnei as a role model and Cissnei might see the potential in the cadet. There could also be themes of loyalty and camaraderie within the military context that are explored in these fanfics.
One common theme is camaraderie. They are often on the same side in a fictional setting, so they build a strong bond of friendship and mutual respect.
One common theme is the clash of cultures. Naruto's world is full of ninjas and chakra, while the Winter Soldier's world has advanced technology and a different kind of warfare. Another theme could be redemption. Just as the Winter Soldier has a past to atone for, Naruto also has his own demons to face, and in fanfics, they might help each other in that journey.
One common theme is redemption. The Winter Soldier has a dark past, and often in these fics, the OC plays a role in helping him find redemption. For example, through their friendship or love, the OC encourages Bucky to face his demons.
Love is a common theme. It could be the love between a soldier and a girl back home, or the love that a girl has for her soldier family member. For example, in many novels, the girl waits patiently for her soldier lover to return from war.