Another theme could be her own growth as a character. In the series, she has her own journey, and in fanfics, this can be expanded upon. For instance, she might have to deal with personal issues outside of her teaching role, like her past relationships or her family. And how she overcomes these things can be a major part of the fanfic. It gives the author a chance to delve deeper into her character than what was shown in the original series. This can make for some really engaging stories as readers get to see a different side of her.
There are probably some on Archive of Our Own as well. The great thing about AO3 is that it has a wide range of fanfics with different themes. In the case of Karasuma Irina fanfics, you might find some that are more centered around her character development, like how she becomes a better teacher or how she overcomes her own insecurities in the 'assassin classroom' world.
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.
One possible plot could be that Irina and Karasuma are forced to work on a top - secret mission together outside of the classroom assassination context. Maybe they have to infiltrate an enemy organization where Irina uses her charm skills and Karasuma his combat and strategic abilities. They start off bickering as usual but gradually develop a deeper understanding and respect for each other during the course of the mission.
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.
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.
There could be some Irina x Karasuma fanfics on FanFiction.net as well. Look for ones with high ratings and good reviews. Maybe there are some that focus on how they interact in different scenarios, like during a mission or in a more relaxed, off - duty setting. It really depends on what kind of story you're interested in.
One common theme is the rediscovery of their relationship. With Karasuma having amnesia, Irina has to find ways to make him remember their connection, which often involves a lot of emotional moments.