The theme of self - discovery also exists. The characters have to figure out how to best use their op systems, which often leads to them learning more about themselves. In 'The Legendary Moonlight Sculptor', the protagonist discovers his own potential and the true nature of his system as he faces various challenges in the game world.
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.
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.
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.
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.
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 more theme is self - discovery. The female oc usually has to figure out who she is in the context of her new - found power. For example, in many stories, she discovers her true potential and purpose as she battles various challenges.
Power acquisition. Protagonists usually start from a relatively weak state and gradually gain power through the world domination system, like getting new abilities or resources.
One common theme is sacrifice. Characters often have to sacrifice themselves heroically for the greater good, whether it's to save their friends, their world, or to uphold a certain value. Another theme is redemption. Sometimes, a character's death is a way to atone for past mistakes.
A common theme is the female character disrupting the existing power structure. Since she's op (overpowered), she often challenges the traditional hierarchy in the Naruto world. For example, in some fics, she might outperform the strongest ninja in combat, causing shock and awe among the characters.