In fanfic, Karasuma can be a source of stability for the students. He is not only teaching them assassination techniques but also life lessons. His no - nonsense attitude can be a guiding force for the students, especially when they are faced with moral dilemmas in their training. For instance, when a student has to decide between a quick kill and a more humane approach, Karasuma's influence might come into play.
Karasuma in fanfic can be seen in various relationships. For example, his relationship with the other teachers and how they collaborate to handle the students. His interactions with the students also show his growth as a character. Sometimes, fanfic writers explore his past, which may not be fully revealed in the original work, adding more depth to his character.
They could start by having more conversations outside of work - related topics. This would allow them to bond on a personal level. For example, they could talk about their hobbies or past experiences. Karasuma might share his military training stories, and Koro - sensei could talk about his travels before coming to the school. As they get to know each other better, their relationship would develop into a more complex and interesting one.
I think 'Karasuma's Unspoken Feelings' is a good one to begin with. It has a simple yet engaging plot that slowly unfolds the connection between Karasuma and the reader. The writing style is easy to follow and it does a great job of building up the relationship.
One common theme is the 'forbidden love' aspect. Since Karasuma is often in a position of authority in the original story, a relationship with the reader (who could be a student or someone in a subordinate position) can be seen as taboo. Another theme is growth. The reader may help Karasuma grow as a person, and vice versa. They might help each other overcome their insecurities or past traumas.
One common theme is the slow - burn relationship. Given their personalities and the nature of their work in the original story, it often takes time for their relationship to develop, and this is a popular theme in fanfictions. Another is the 'opposites attract' idea, as Irina is more flamboyant and Karasuma is more stoic.
The theme of sacrifice also appears sometimes. Karasuma's job or his sense of duty might put him in a position where he has to sacrifice his own happiness or time with the reader. This creates a lot of drama and tension in the fanfics, and makes for an interesting read as the characters struggle to overcome these obstacles.
One possible theme could be the development of their relationship. It might start from a professional acquaintance and gradually turn into something more personal and romantic.
The theme of mutual growth also appears often. As they interact more, they help each other become better versions of themselves. In some fanfics, Irina might teach Karasuma to be more in touch with his emotions while Karasuma helps Irina to be more responsible. Their relationship becomes a catalyst for personal development.
A great fanfic would also have an engaging plot. It could be a mystery where they have to solve a case together related to the assassination classroom world. Or it could be a story of redemption where one of them has made a mistake in the past and the other helps them make amends. This would add depth to their relationship and make the story more interesting.