I'm not entirely sure as the name seems rather unique. It could potentially be a very personal or region - specific novel. Maybe it's about a character who is seen as essential to someone's every flaw, but without more context it's hard to say for certain.
One great 'akutagawa x higuchi fanfic' is 'A Shared Path' which delves deep into their relationship, exploring how they support each other in difficult times. It has well - written dialogue that really brings their characters to life.
I'm not certain which are the most popular ones precisely. However, if there were any adaptations that made it to international film festivals, they might gain more popularity. Films like that could introduce Higuchi's stories to a wider audience outside of Japan.
One common theme is loyalty. They are often shown as being loyal to each other in various situations. For example, in some fics, Higuchi will always stand by Akutagawa no matter what.
A great higuchi x gin fanfic usually has an engaging plot. It could be a story of their secret alliance, or perhaps a situation where they have to work together against a common enemy. The plot should keep readers interested and guessing what will happen next. Moreover, the dialogue in the fanfic is also important. It should be natural and in - character, which helps to bring the story to life.
Harry Potter himself is a likely candidate. Given his heroic nature and the need to constantly fight against dark forces, an Akuma no Mi could be a great addition to his arsenal of skills. It would give him new ways to protect his friends and defeat his enemies.
Sasuke. If Sasuke had an Akuma no Mi power, like the Goro Goro no Mi (Rumble - Rumble Fruit), it would make him even more formidable. He could use lightning - based attacks from his ninjutsu in combination with the electrical powers of the fruit. His already brooding and powerful character would become even more complex and dangerous.
Enid is also a favorite. She's strong and has a cool personality, so in fanfiction she might be involved in some exciting battles or have her own sub - plot about her past or her relationships.
I'm not sure specifically which 'ko ko film' you are referring to. There could be many films with various real - story themes. It might be about a person's journey, a historical event, or a social issue.