A common theme is the clash of different power systems. Since Odin comes from Norse mythology and DxD has its own complex power structure, seeing how they interact is often explored. Another theme is the idea of prophecy. How Odin's knowledge of the future might play a role in the DxD world's events.
Another theme is destiny. Fans often write about how Naruto's pre - determined path as a hero in his world might be affected or enhanced by Odin's presence. It could be that Odin has some foreknowledge that he imparts to Naruto, changing his course of action.
One common theme could be power struggles. Since both orochi and odin are powerful figures, their relationship in fanfiction might involve jockeying for power or influence. Another theme could be cultural clash, as they come from different mythologies.
One common theme is redemption. Maybe Odin is trying to make up for past wrongs towards Loki. Another is family drama, as their relationship is complex in the original mythology.
The common themes in 'Harry Potter Son of Odin' fanfiction can be quite diverse. One is the clash of cultures. You have the very British wizarding culture of Harry Potter and then the Norse - influenced by Odin - culture. How these two cultures interact and sometimes clash is an interesting theme. Another theme is the search for self - understanding. Harry has to figure out who he is now that he has this new identity. Is he still the same Harry Potter who grew up in the cupboard under the stairs? And there's also the theme of loyalty. His friends in the wizarding world might be a bit skeptical or even scared of his new identity, and he has to decide where his loyalties lie - with his old friends or with this new part of himself that is related to Odin.
A frequent theme is the exploration of new powers. Since Odin has many powerful abilities in Norse mythology, Naruto as his heir would have to learn and master these. There's also often a theme of forging new alliances. Naruto might have to work with characters from Norse mythology or convince his friends in the Naruto world of his new role. And the theme of destiny is common too, as Naruto has to fulfill his new - found destiny as the heir of Odin while still following his own path as a ninja.
One common theme is power - up. Characters from both Naruto and DxD often gain new powers or abilities when combined in fanfiction. Another theme is the exploration of different cultures. Since Naruto has its ninja culture and DxD has its own demon and angel - related cultures, fanfictions often explore how these cultures interact.
One common theme is power - leveling. Just like in regular gamer stories, the characters in dxd gamer fanfiction often strive to increase their stats and abilities through various in - game - like mechanics. For example, they might defeat powerful enemies to gain experience points.
One common theme is power. Godzilla is extremely powerful, and in the DxD universe which also has powerful characters, exploring how his power compares and interacts is a big theme.
Another theme is the exploration of the afterlife. Given that reapers are associated with death and the afterlife, fanfictions often explore how the DxD world's view of life and death is affected by the presence of a reaper. They might show how the reaper's knowledge of the afterlife changes the perspective of the DxD characters.
A theme of acceptance is also prevalent. Loki is often seen as an outcast, and Odin's love can represent acceptance of Loki's true self, whether it's his magical abilities, his different nature compared to the other Asgardians, or his past mistakes. This acceptance can be a slow and arduous process in the fics, full of emotional ups and downs.