A sense of isolation or being different is also common. Because they are OP, they might not be fully understood by the natives of the isekai world. In 'Re:Zero − Starting Life in Another World', Subaru has his own set of powers that make him unique, and he often feels isolated as he tries to make sense of his situation and use his OP ability (return by death) to his advantage.
The theme of harem or multiple relationships also exists in some 'op isekai light novel'. The OP male protagonist often attracts female characters. In 'In Another World With My Smartphone', the main character has multiple female companions around him. This adds a romantic or relationship - based sub - plot to the overall story of the isekai adventure and power growth.
Another common theme is the fish - out - of - water situation. The MC is transported to a new world, so they have to adapt to new cultures, magic systems, and social structures. In 'Konosuba', Kazuma has to deal with all the crazy things in the isekai world while trying to make the best of his situation with his OP party members. And they often have a goal, like saving the new world or finding a way back home, which drives the story forward.
Well, one common theme is the exploration of the isekai world itself. The OP characters often go on adventures, discover new places, and uncover secrets. Another is the concept of relationships. They form alliances, make friends, and sometimes enemies in the new world, and these relationships are shaped by their OP status. Also, the theme of challenging the status quo is present. Their OP abilities give them the power to change things in the world they are transported to, whether it's the political system or the way magic is used.
One popular 'isekai op character light novel' is 'Overlord'. In this novel, the main character Momonga is extremely powerful as he gets transported to a new world. He has the abilities and knowledge from his previous gaming life which makes him OP in the new world.
Well, love and relationships are also common themes. It could be the love for their new friends or even a romantic relationship. In addition, the theme of changing the world or the status quo is present. The mom characters often bring new ideas from their previous life and try to implement them in the isekai world, whether it's about improving education, healthcare or just general living standards.
Survival is also a major theme. Since they are in a strange isekai world, they need to use their assassin - like skills to survive. In 'Re:Zero − Starting Life in Another World', Subaru has to constantly figure out ways to stay alive in the face of many threats.
Another theme is the exploration of new worlds. When the character is transported to a different world in isekai, they encounter new cultures, species, and social structures. This can create opportunities for ntr - like situations as the protagonist's original relationships might be challenged by new relationships formed in the new world. It's like their old world values and bonds are put into a new context.
Survival is also a big theme. Iori is usually thrown into a world full of danger, and he has to figure out how to stay alive. This involves things like finding food, shelter, and avoiding powerful enemies. Additionally, there's often a theme of friendship or camaraderie as Iori teams up with other characters in the isekai world.
Rebuilding society can also be a theme. Even though the world is in chaos, the 'op mc' may have the ability and the will to start building something new. There is often a sense of adventure as well. The main character goes on quests, discovers new places, and uncovers secrets in the apocalyptic landscape. And there's the theme of morality. In a world where the rules have changed, the 'op mc' has to decide what is right and wrong.
Power progression is a common theme. The OP main character usually starts from a certain level of strength and becomes even more powerful over time. Another is the development of relationships with multiple female characters. They often start with misunderstandings or the main character helping the females in some way, and then relationships grow.