One interesting Chisaki fanfiction could be about his backstory before he turned to the dark side. It might explore his relationships with his family or early experiences that led him to develop his extreme beliefs. Another could be a redemption arc fanfiction, where he is given a chance to change and make amends for his actions in the series.
A really cool Chisaki fanfiction could be about his encounter with a powerful entity that challenges his view of the world. This entity could make him question his actions and motives. The fanfiction could then follow his journey of self - discovery as he tries to figure out if his path was truly the right one. It might also involve some intense battles and moral dilemmas that he has to face.
Some fanfictions might focus on Chisaki's relationship with other characters in a different light. For example, a story where he forms an unlikely alliance with a hero due to a common goal. It could show how their different ideologies clash and merge as they work together. There could also be fanfictions that are set in alternate universes, like a world where Chisaki was raised in a completely different environment and how that changes his character.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3). It has a large collection of 'Boku no Hero Academia' fanfictions, and you can specifically search for Chisaki - related ones. Another option is Fanfiction.net, which also has a wide range of stories. Just use the search function and type in 'chisaki' along with the name of the anime.
One interesting 'boku no hero academia reaction fanfiction' story could be about the characters' reactions to a new, extremely powerful villain in the city. For example, Deku might initially be in shock but then quickly analyze the villain's weaknesses. Another could be their reactions to a new hero joining their school. They might be curious or even a bit jealous of the new hero's skills.
One interesting Mina fanfiction could be about her training journey. She might face challenges that test her skills and her ability to work in a team. This could include new villains and unique quirk-related problems.
There might be a fanfiction where Jirou has to overcome her stage fright in order to use her quirk more effectively in public battles. In this story, she could go through a series of training and self - discovery arcs, making friends along the way who help her face her fears. It could also explore her relationships with other characters from 'Boku no Hero Academia' like how she interacts with her classmates during these trying times.
One interesting yandere Boku no Hero Academia fanfiction could be about a yandere character obsessing over Deku. Maybe they try to keep him all to themselves by sabotaging his relationships with other heroes - in training or real heroes. For example, they might spread false rumors about Uraraka to drive a wedge between her and Deku.
One interesting Mandalay fanfiction could be about her mentoring a new group of students with unique quirks. It might explore how she uses her telepathy quirk to better understand and guide them.
One interesting 'boku no hero academia eri fanfiction' story could be about Eri learning to control her powers in a new and unique way. Maybe she teams up with Deku to face a new villain that specifically targets her powers.
One interesting Mineta fanfiction could be about him overcoming his more...controversial traits and becoming a more respected hero. Maybe he has a moment of self - realization and starts to focus more on using his quirk for good in a more heroic way.
There are some 'boku no hero academia lemon fanfiction' that focus on character development through unique situations. Maybe a story where Bakugo has to team up with a villain-turned -hero and they develop an unexpected bond. This could involve a lot of emotional growth and interesting interactions that are different from the original plot.
One interesting Tsuyu fanfiction could be about her training in a new and extreme environment. Maybe she's sent to a special training ground with unique challenges that test her abilities to adapt and use her quirk in different ways.