One common theme is adventure. Ash is often portrayed going on exciting journeys in the marine world. Another theme is friendship. He forms bonds with marine creatures or other characters in these stories.
Adventure is also prevalent. They often go on exciting journeys together, like exploring new islands or searching for lost treasures. These adventures allow for character growth and development.
One common theme is loyalty. His loyalty to his Marine comrades and how that loyalty extends to his work at NCIS later. Another is self - discovery. His time in the Marines often serves as a period where he figures out who he really is.
One common theme is friendship. Since Tails and Marine are from different worlds, their growing friendship is often explored. Another theme is adventure. They usually embark on some sort of journey together.
One common theme is the 'forbidden love' aspect. Since Tails is from the land and Marine is from the sea, their different habitats can be seen as a barrier, like in Romeo and Juliet. Another theme is discovery. They discover new things about each other's worlds and themselves through their relationship.
One common theme is adventure. For example, sailors going on long and dangerous voyages, exploring uncharted waters. Another is the power of nature. The sea can be calm and beautiful one moment and a terrifying force the next, as seen in many stories about storms at sea. Friendship also often features, like the bond between crew members on a ship.
One common theme could be adaptation. The female marine has to adapt to the unique environment of Bon Temps, which might be very different from her military life.
One common theme is the idea of overcoming differences. Since Shanks is a pirate and the female marine has to uphold the law, there's often a struggle with their opposing ideologies at first. Another theme could be love against all odds. Their relationship is usually seen as something that goes against the norms of their respective worlds.
Adventure might be a common theme. Given that one is a marine, there could be stories where they go on adventures together, facing various challenges in different environments. And of course, the relationship between the marine and the female turian evolving during these adventures.
A third common theme is the relationship with pirates. In OC Marine One Piece fanfiction, the interactions between the OC Marines and pirates can range from intense battles to unexpected alliances. Sometimes, the OC Marines might learn something from the pirates about freedom or the true nature of the world, which challenges their beliefs as Marines. This creates a lot of interesting storylines and character development.
One common theme is the power of the ocean as a metaphor for the power of love. The vastness and unpredictability of the sea can mirror the intensity and uncertainty of a relationship.