Another theme is the psychological aspect. Hisoka is a very complex character. Fanfics usually explore how the self - inserted character deals with Hisoka's unpredictable and often disturbing psyche. It can be about fear, fascination, or both.
The exploration of the Hunter world itself is also a major theme. The self - insert characters are usually new to this world, so they get to explore different places like the Hunter Exam locations, the various Nen - using groups, and the dark corners of the world. They might be fascinated by the unique cultures and powers they encounter, and this exploration drives the story forward. Some fanfictions also focus on the theme of power - seeking, where the self - insert character is either trying to gain power for a noble cause or is being tempted by the power - hungry nature of the Hunter world.
Another theme is the idea of an unorthodox relationship. They are both rather strange characters in their own ways, and fanfics usually show how their relationship is not like a normal friendship or romance. It's something much more complex and full of intrigue.
Another one is 'In Hisoka's Shadow'. This fanfic focuses on the self - inserted character trying to survive in the world of 'Hunter x Hunter' while being constantly in Hisoka's orbit. The author does a good job of showing the danger and allure of Hisoka through the eyes of the inserted character.
In 'Hunter x Hunter' male self - insert fanfiction, a common theme is the exploration of the complex world. The self - insert male character gets to experience all the different aspects of the Hunter x Hunter world like the different types of Nen, the various Hunter organizations, etc. Another theme is the hero's journey. The character embarks on a quest, faces challenges, and overcomes them, much like a traditional hero. Also, the theme of identity is quite common. The character has to define who he is in this new and strange world, which often involves reconciling his modern - day self with the values of the Hunter x Hunter world.
One common theme is the exploration of their opposing personalities. Hisoka is wild and unpredictable, while Machi is more reserved and practical. Fanfictions often play with how these differences can create either conflict or an unlikely attraction.
A prevalent theme is also the idea of an unlikely alliance. The OC might form an alliance with Hisoka for various reasons, like a common enemy or a shared goal. And of course, there's the theme of self - discovery. As the OC interacts with Hisoka and other characters from 'Hunter x Hunter', they often learn more about themselves and their own capabilities. For example, in some fanfictions, the OC discovers hidden powers while facing challenges related to Hisoka.
A theme that often shows up is Hisoka's relationships, especially his strange dynamic with Gon and Killua. Some fanfictions focus on how Hisoka views these young hunters and how his interactions with them shape the story. Also, his flamboyant and unpredictable nature is a theme that writers like to play with, creating all sorts of scenarios based on his unique personality.
There's a fanfic called 'Hisoka's Obsession with Machi'. It delves into Hisoka's perspective. He is constantly intrigued by Machi's skills and her cold exterior. The story has some interesting scenes where Hisoka tries to get closer to Machi, and Machi is both repelled and fascinated by him at the same time. It's a really engaging read.
Well, Hisoka's origin story in Hunter x Hunter is quite interesting. He hails from Meteor City, a place that's more like a dumping ground for the unwanted. Growing up there, he was exposed to all sorts of things that normal people wouldn't experience. His love for fighting strong opponents probably stems from the fact that in Meteor City, strength was the only way to get what you want. Hisoka's nen abilities are also a product of his environment. He's constantly evolving and seeking new challenges, which is likely a trait he developed while growing up in a place where only the fittest survive.