One of the main themes might be isolation. Since he is the 'enemy of the world', he is likely to be alone against many. This could lead to themes of self - discovery as he has to rely on his own strength and resources. Additionally, the theme of justice could be present. He might be fighting against an unjust world that has deemed him an enemy without proper cause. It could also involve the theme of transformation, as he has to adapt to his situation as an enemy and change to overcome his foes.
One similar web novel could be 'Lord of the Mysteries'. It also has a complex world - building and engaging characters. Another is 'A Record of Mortal's Cultivation to Immortality' which shares the aspect of the protagonist facing numerous challenges in a vast and often unfriendly world. There's also 'Overlord' where the main character has to deal with various threats in a new world.
Love against all odds could be another theme. In a BL context, the two male characters falling in love in a situation where they might face external opposition or internal doubts due to their initial enmity. It may also explore themes of self - discovery as they navigate their relationship.
One of the main themes in 'The Enemy' is the loss of innocence. These children are forced into a world of violence and decision - making that they shouldn't have to face at their age. Also, the theme of community is important. They have to decide who to trust and how to build a community together in the ruins of the old world.
One main theme could be identity. The character being reborn as the enemy prince must grapple with a new identity that is in opposition to their former self or allegiances. Another might be redemption. They may strive to make up for past wrongs between the two sides. Also, power struggles are likely a theme, as the prince is in a position of power and has to navigate the political intrigue within the enemy's court.
I'm sorry, I haven't read 'Beloved Enemy Web Novel' specifically, so I can't give you the exact plot. But generally, in novels with 'beloved enemy' in the title, it often involves a relationship between two characters who start off as enemies but then develop some form of deep affection for each other over time.
One of the main themes is perseverance. The protagonist Subaru has to face numerous challenges and setbacks in the other world but keeps trying to move forward. Another theme is the power of relationships. His bonds with other characters like Emilia play crucial roles in his journey.
Probably the theme of self - discovery. As the characters interact in this unexpected relationship, they might learn more about themselves. For example, they could realize that their previous notions of the 'enemy' were wrong.
Revenge could be a main theme. If one is trying to take an enemy's heart, it might be out of a desire for revenge. For example, if an enemy has wronged the protagonist deeply in the past.
One of the main themes is friendship. Naruto has his friends like Sasuke and Sakura, and their relationships are central to the story. They support each other through various challenges.
One main theme could be identity. Characters might be exploring who they are within the web of relationships and the world around them.