One common theme is mentorship. Vegeta, with his vast combat experience, could potentially mentor Pan. For example, he might teach her new fighting techniques. Another theme is family - like relationships. Since Vegeta is part of Goku's extended family in a way, he could have a grandfather - like role to Pan. And of course, adventure themes are also common. They could team up to face a new threat in the Dragon Ball universe.
Often, there are themes related to loyalty and friendship. In a harem situation, Vegeta has to navigate through different levels of loyalty from the various characters in the harem. Some may be loyal because of his power, while others may have a deeper emotional connection. Also, the theme of competition can be seen, as the characters in the harem might compete for Vegeta's attention, whether it's in terms of combat skills, intelligence, or emotional support.
Since we should avoid the 'lemon' aspect which is often not appropriate, in general Vegeta is usually depicted as a strong and proud character. He might be shown as a mentor - like figure to Pan in fanfiction. Pan, on the other hand, is often a curious and energetic character. In non - inappropriate fanfictions, their relationship could be one of mutual respect and growth, with Pan looking up to Vegeta for his power and experience.
One common theme could be Pan's growth as a fighter. With Goku's influence, she could be learning new techniques and becoming stronger. For example, Goku might be teaching her the Kaio - ken technique, and the story could revolve around her struggles and progress in mastering it.
One common theme is mentorship. Vegeta, being a powerful Saiyan, often takes on the role of teaching Pan new skills and helping her control her power. For example, in many fanfictions, he trains her in combat and energy control.
One common theme is her role as a strict but fair teacher. Many fanfictions explore how she imparts knowledge and discipline to the students. Another theme is her relationship with Dumbledore. Some fanfictions might delve into their friendship and how they worked together to protect Hogwarts.
Many pan and goten fanfictions explore the concept of legacy. As the descendants of Goku and other powerful Saiyans, they carry a certain legacy. Fanfictions may show how they live up to or struggle with that legacy. Some stories might also involve them exploring new forms or powers that are unique to their generation, adding an element of discovery and growth to the narrative.
One common theme is friendship. Wendy and Natsu are both part of the Fairy Tail guild, and their friendship is often explored. Writers might show how they support each other during tough battles or how they grow closer as they go on adventures together.
If we exclude the adult - related themes that 'lemon' might imply, common themes in mermaid fanfiction could be the mermaid's longing for the human world. Mermaids might be curious about human culture, technology, or relationships. Another theme could be the mermaid's struggle to fit in, either in the human world or in their own mermaid society if they have some unique trait or ability that sets them apart.
One common theme is the mentorship aspect. Batman is often portrayed as a mentor to Robin, teaching him the ways of crime - fighting and justice. Another theme is the family - like bond between them. They support each other through tough times and are like father and son or brothers in many stories. Also, the theme of growth is present, as Robin develops his skills and matures under Batman's guidance.
Also, the cultural differences between them can be a major theme. Inukagome come from different backgrounds, and fanfiction can play with how they bridge those gaps, learn from each other's cultures, and how that affects their relationship. This can add depth and richness to the stories without any inappropriate elements.