First, study their characters. Know their personalities, backstories, and how they interact in the original story. For example, Shinobu is often calm but has a hidden fierceness, and Giyuu is a bit of a loner. Then, come up with an interesting plot. It could be about them going on a joint mission where they face a new type of demon. Keep in mind their relationship dynamics as you write.
Start by brainstorming ideas. Maybe you could write a fanfic set in an alternate universe where Shinobu and Giyuu have different roles. As you write, use vivid descriptions to bring their world to life. Describe the scenery, their expressions, and their actions. For instance, when writing about Giyuu's swordsmanship, make it exciting and detailed. Also, don't forget to show their relationship evolving throughout the story.
In a Giyuu x Shinobu fanfic, the setting and plot can vary widely. Some might be set during the main events of the Demon Slayer universe, with them facing demons together. Others could be more of an alternate universe story, where they meet under different circumstances, like in a modern - day high school AU. The fanfic could also delve into their backstories and how those experiences shape their relationship. For instance, Shinobu's past with her sister could play a role in how she opens up to Giyuu, and vice versa for Giyuu's own traumas.
I would recommend 'Whispers of the Heart' for Giyuu x Shinobu fans. This fanfic focuses on their unspoken understanding. It's full of small moments that build up their relationship, like when Shinobu leaves a small flower on Giyuu's doorstep as a sign of her care. Also, 'Shadows and Sunlight' is worth checking out. It has a great plot that involves them having to go on a secret mission together and how that journey changes their relationship from colleagues to something more intimate.
One common theme is the exploration of their contrasting personalities. Shinobu is often seen as more outgoing and mischievous while Giyuu is more stoic. Fanfics like to play with how these two different personalities interact and find common ground. Another theme is the idea of healing. Given their experiences in the main story, fanfics may show how they heal each other's emotional wounds.
One great 'shinobu and giyuu fanfic' is 'The Unspoken Bond' which delves deep into their complex relationship. It shows how they gradually come to understand and support each other in the face of various challenges in the Demon Slayer world.
How about 'Giyuu x Shinobu: The Jealousy Factor'? This title clearly shows the relationship between the two characters and the key aspect of jealousy. It gives a hint to the readers about what the fanfic might be about, which is the jealousy that could exist in their relationship.
The plot could start with Shinobu noticing Giyuu getting a lot of attention from a new recruit. She starts to feel jealous as she realizes she has feelings for Giyuu. Giyuu, on the other hand, is oblivious to Shinobu's feelings and the new recruit's admiration, which causes more tension.
There's a fanfic titled 'Shinobu and Giyuu: A Different Perspective'. This fanfic is interesting as it shows their relationship from a unique angle, exploring how they might interact in different scenarios outside of the main story's events. It also has some really great dialogue that makes their relationship seem more real.
The Giyuu x Shinobu comics usually have beautiful art and an engaging story. They often focus on the chemistry between the two characters.
One common theme is the exploration of their relationship. Given their different personalities in the original work, fanfictions often focus on how they bridge the gap between them, like how Giyuu's stoicism and Shinobu's more cheerful yet calculating nature interact.
Giyuu and Shinobu have a professional connection within the manga. They both strive to eliminate demons but have distinct personalities and approaches. Their interactions contribute to the overall story and character development.