Romance is also a big theme. Writers often explore the relationship between the reader and Chishiya, from the initial attraction to a deeper emotional connection. Some fanfictions focus on how they fall in love in the midst of the chaos of the Borderland.
One characteristic is that they often focus on Chishiya's intelligence. Writers like to show how he outsmarts others in various situations. For example, in many fanfics, he's the one who figures out the rules of the deadly games first.
One great source could be Archive of Our Own (AO3). There are numerous fanfics about Chishiya x Arisu there. You can filter by rating, length, and genre to find the ones that suit your taste.
You can try websites like Archive of Our Own (AO3). It has a large collection of fanfictions, including Chishiya x Reader ones. Just use the search bar and type in 'Chishiya x Reader' and you'll get a bunch of results.
In the Alice in Borderland manga, unfortunately, Chishiya met his end. The circumstances of his death were quite dramatic and tied to the overall plot progression.
Well, it could be about a BTS member accidentally running into a gymnast YN at a sports event. Maybe they get to know each other gradually and BTS is inspired by YN's dedication in gymnastics. It could also involve YN getting a chance to perform at one of BTS's concerts, creating a unique and exciting plot.
Well, 'Chishiya and the Lost Memories' is quite popular. In this fanfic, Chishiya wakes up with partial amnesia and has to figure out his past while still being his intelligent self. It has a really engaging plot. Also, 'Chishiya's Allies' is good as it focuses on his relationships with other characters in a more detailed way.