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.
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.
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.
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 genre also often features elements of self - discovery for the MC. Despite being overpowered, they still need to figure out their place in this new world. They may face moral dilemmas, form relationships, and learn about the history and secrets of the isekai world. This combination of OP abilities and personal growth in a new and strange setting is what makes the 'op mc isekai light novel' genre so appealing to many readers.
Power - up is a common theme. The protagonists usually start from a weak state in the new world and gradually gain power through various means, like training or getting special abilities. Another theme is harem. Often, the male protagonists are surrounded by multiple female characters who are attracted to them for different reasons.
One common theme is adaptation. The characters need to adapt to their new forms and the new world they are in. For instance, if they are reincarnated as a non - human mob, like a slime or a goblin, they have to figure out how to live with that. Another theme is the subversion of expectations. Often, mobs are considered weak, but in these novels, they turn out to be extraordinary in some ways. In 'The Saga of Tanya the Evil', Tanya, despite her initial position, is able to use her unique skills and knowledge to rise above the norm. These themes all contribute to the popularity of 'isekai mob light novel'.
One common theme is self - discovery. Protagonists are often thrust into a new world and have to figure out who they are in this new context. Another theme is power - building. They usually start from a weak state and gradually gain strength. For example, in 'That Time I Got Reincarnated as a Slime', the slime protagonist slowly builds an entire nation around him.
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.