The overall mood of the story could be different. With Rin as a girl, there could be more of an emphasis on femininity and the different perspectives that come with it. There could be more scenes about her dealing with the expectations placed on women in the exorcist world, such as different training regimens or social rules, which would add a new layer to the Blue Exorcist universe.
The story would change in terms of the romantic sub - plots. If Rin was a girl, there could be new love interests emerging. Maybe some characters who were just friends before would start to have romantic feelings for her. For example, Bon might see her in a completely different light and develop a crush.
The power dynamics within the group could shift. As a girl, Rin might face different challenges when it comes to being respected as an exorcist. Some of the more traditional characters might underestimate her at first. However, she could prove them wrong with her skills and determination, which would be an interesting arc to follow.
One possibility could be that his relationships with other characters would change drastically. For example, his friendship with Yukio might become more protective on Yukio's part as he now has a sister - like figure in Rin. Also, his interactions with the other exorcist trainees could be different. They might be more hesitant around him as a girl, or some might be overly friendly in a different way.
Well, one thing that could happen is that her relationships with other characters would shift. For instance, some male characters who were just friends might start having different feelings towards her. And she might face different challenges from other female characters who could be jealous or supportive in different ways.
In terms of the story's visuals, if there are any descriptions of battles or action scenes, her appearance as a girl would change how they are depicted. For example, instead of the more brute - force approach that male Rin might take, she could be more agile and use her smaller stature to her advantage. And in more emotional scenes, her appearance as a girl might make her expressions and body language be read differently by the other characters and the readers.
In a fanfic where Rin is secretly a girl, the author could explore themes of identity and self - discovery. Rin might struggle with coming to terms with her true gender while also dealing with the challenges of being an exorcist. It could add a whole new layer of depth to the character and make for a very engaging story.
His friends would be very worried. Shiemi, for example, would probably bring some herbs that she thinks might help with the fever. She would be gentle and try to make Rin comfortable. Izumo, on the other hand, would be a bit more brusque but still concerned. She might scold Rin for not taking better care of himself while also trying to find a solution to his fever.
If Rin dies in the fanfic, Yukio would be devastated. They have a complex relationship as brothers. Yukio might blame himself for not being able to protect Rin. He could become withdrawn and more focused on revenge against the demons, even at the cost of his own well - being.
Check out the official Blue Exorcist forums if there are any still active. Sometimes, fans post their fanfics directly on these forums for others to read and comment on. Also, don't forget to look at the comment sections of Blue Exorcist - related YouTube videos. Sometimes, fans will mention great fanfics they've read in the comments, and you might be able to track them down from there.
Some fanfics focus on Rin's power development in a different way from the original story. Maybe she discovers new powers or has to learn to control her existing ones in a more challenging situation. There are also fanfics that explore Rin's family relationships in more depth, especially her connection to her father. This could involve flashbacks or new revelations about her family's past.
One great fanfic could be 'The Bond Beyond Worlds'. It delves deep into the relationship between Amaimon and Rin. The author beautifully portrays how their unique connection evolves over time, with Amaimon's mischievous nature clashing and yet also complementing Rin's more determined and righteous personality. It's filled with exciting adventures and some really heart - warming moments that fans of the pairing will surely enjoy.
In 'Blue Exorcist Rin fanfic', a very frequent theme is Rin's battle against his inner demons, both literally and figuratively. His journey to master his demonic powers while still remaining true to his human side is often explored. Also, his relationship with the exorcist community, whether it's facing discrimination or finding acceptance among them, is a common theme. Additionally, his friendships, especially with the people he meets at True Cross Academy, are often a big part of the stories.