One popular theme is Nikolai's adventures before and during his reign. Writers often explore his charm and wit in dealing with various political and personal challenges. Another theme could be his relationships, like his romantic relationships or his friendships with other characters from the series. Also, his transformation from a carefree prince to a responsible king is a rich area for fanfic exploration.
One great 'Nikolai Lantsov x Reader Fanfic' is 'A Royal Encounter'. It beautifully portrays the relationship between Nikolai and the reader. The story is set in the opulent world of the Ravkan court, and the author does an excellent job of showing the initial attraction and the development of deeper feelings. It has a perfect blend of romance, court intrigue, and the charm of Nikolai's character.
A common theme is royalty and class differences. Since Nikolai is a prince, there's often the struggle of the reader, who is usually not of noble birth, to fit into his world. Another theme is adventure. Given Nikolai's role in the Grishaverse, many fanfics involve the two going on exciting adventures together, facing danger and growing closer in the process.
You can start by looking on Archive of Our Own (AO3). It has a large collection of fanfics from various fandoms, including those related to Nikolai Lantsov. Another option is Fanfiction.net, though the quality can be a bit more variable there. Some Tumblr blogs also post or recommend nikolai lantsov fanfics, so it's worth checking out Tumblr as well.
One popular theme is their relationship development. Fans like to explore how their feelings for each other grow and change over time, from initial attraction to deeper love.
One of the main themes is poverty. Akaky Akakievich's poverty is central to the story. He can barely afford the basic necessities, and the overcoat becomes a luxury for him.
One of the main themes is often the exploration of human nature. Leskov delved into the complex aspects of people's characters, showing both their virtues and flaws. Another theme could be the social and cultural environment of his time. His stories might reflect the values, norms, and class differences in the society he lived in. Also, morality is a significant theme, as he examined the moral choices characters made and the consequences that followed.
The theme of redemption can also be present. Maybe one of them has a troubled past, and through their relationship with the other, they find a way to redeem themselves. It could be that nikolai has made some mistakes in the past, but takeo's influence helps him to become a better person, and vice versa. This adds an interesting layer of depth to their relationship in the fanfiction.
Often, such a cartoon might center around Nikolai's leadership style. It could also touch on specific events or decisions he's made and the public reaction to them. Maybe it shows how his actions affect different groups of people.
One popular theme could be adventure. Imagine Obani Iguro and Yuichiro Tokito going on a journey together through mysterious lands, facing various demons and challenges along the way. Another theme might be friendship development. It could show how they start off as acquaintances and gradually become close friends, relying on each other in difficult times. And a third theme could be redemption. Maybe one of them has a past mistake or burden, and through their relationship in the fanfic, they find a way to redeem themselves.