Redemption. Sometimes, the MC has to redeem themselves in the eyes of others. They may have been wrongly accused or misjudged at the start. So they go through a journey of proving their worth and showing that they are not what others thought them to be. This can be seen in novels where the MC is from a 'bad' group but turns out to be a hero.
Isolation. The misunderstood MC often feels alone because others don't get them. For instance, in many stories, the MC might have a special power or come from a different background that others can't fathom, so they are left on their own most of the time.
Survival in a new and dangerous world is also a theme. The mc, being overpowered, has to use their power to survive and thrive. In 'Log Horizon', the players are stuck in a game world and the main characters, with their unique abilities, strive to not only survive but also make the best of the situation.
One example could be 'Re:Zero − Starting Life in Another World'. At first, Subaru is often misunderstood by the characters around him. His strange behavior and repeated resets of the timeline make it difficult for others to fully comprehend his motives and actions.
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.
Love and romance are also very common. Usually, there is a love interest, often a human, which adds a layer of complexity to the story. For example, in many such novels, the vampire has to protect their human love from other vampires or from the knowledge of their true nature. It's about the forbidden love aspect. And there's often a theme of power. Vampires are typically powerful creatures, and the main character might be dealing with how to use or control their power, or they might be in a power struggle with other vampires in the story.
The theme of leadership also appears frequently. In 'The Rising of the Shield Hero', Naofumi has to lead his small group of allies against much larger forces. His overpowered abilities give him the means to do so, but he also has to develop leadership skills. Also, there is often a theme of justice. These overpowered characters usually end up fighting for what they believe is right. They use their power to protect the weak or to right the wrongs in the world they inhabit, whether it's a virtual world like in 'Sword Art Online' or a more traditional fantasy world like in other novels.
The main themes in 'mc is ruthless light novel' might include self - preservation. Given that the MC is ruthless, they are likely to prioritize their own safety and well - being above others. Another theme could be moral ambiguity. Their ruthless nature might make them cross ethical boundaries, which could lead to exploring questions about right and wrong in the context of the story. There could also be themes related to competition, as a ruthless MC would be likely to engage in cut - throat competition with other characters to achieve their goals.
One of the common themes is adventure. Many fanfictions put 707 and MC in various adventurous situations. They might be exploring new digital worlds or going on real - world quests together. Also, the theme of self - discovery is present. As MC interacts with 707, they both learn more about themselves. It's like they are mirrors to each other in some ways, and fanfictions love to explore that aspect. There's also the theme of protection. 707 is often portrayed as someone who wants to protect MC, and this is a recurring element in many of these fanfictions.
One common feature is the rapid power growth of the main character. They often start from a low - level state and quickly gain abilities that make them stand out. For example, in 'Overlord', the main character starts as a powerful being in a game world and his power just keeps expanding in the new world he gets transported to.
Another aspect is prior knowledge or experience. In some light novels, the MC is reincarnated or transferred from another world. Like in 'Konosuba', Kazuma has knowledge from his previous life which he uses to his advantage in the new world, and this knowledge combined with his unique skills makes him overpowered in certain situations.