One common theme is power comparison. Since both series have their own unique power systems, fanfictions often explore how they stack up against each other. For example, how would Hisoka's Nen abilities compare to All For One's Quirk in a fight?
A third common theme is the exploration of moral and ethical concepts. Both series touch on these in different ways. In fanfiction, it might be about how a character from one series would react to the situations and moral dilemmas in the other series. For instance, how would Gon handle the hero - villain dynamic in the world of 'My Hero Academia'? This can lead to some deep and thought - provoking stories.
A prevalent theme is the struggle between good and evil. Kurapika is often seen as a symbol of good, while Chrollo represents evil. Fanfictions play around with this dynamic, sometimes blurring the lines between the two. Also, the theme of trust is common. Given their history, it's interesting to see how fanfiction authors make them build trust in each other, like in a story where they have to rely on each other's skills to survive a dangerous situation which spans over a long journey.
One common theme is the exploration of Feitan's dark and mysterious nature. Writers often use the reader's perspective to slowly uncover his secrets. Another theme is the idea of an unlikely relationship. Since Feitan is such a complex and somewhat intimidating character, the relationship between him and the reader is often full of tension and growth.
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.
One common theme is growth. The reader often starts off as a relatively inexperienced character, and through their interactions with Killua, they grow both in terms of their skills as a hunter and in their personal relationships. For example, they might learn how to better control their nen abilities with Killua's help.
One common theme is the exploration of power and control. Given Meruem's position as a powerful being, the fanfiction might delve into how the OC either challenges or submits to his power.
Friendship is a very common theme. Gon and Killua have a strong bond, and many fanfictions explore how this friendship grows and endures different trials. For example, they might face a powerful enemy together and their friendship is what helps them get through it.
One common theme is the exploration of Neon's power. Her unique nen ability often becomes a central focus, like how it can be developed further or what its limits truly are. Another theme is her relationships. Fanfictions might explore her relationship with her father or with other characters in the Hunter x Hunter universe.
The theme of self - discovery is also prevalent. Ichigo is thrown into a new world with different rules. He has to figure out who he is in this new context. He may question his own values and abilities as he faces new challenges in the Hunter x Hunter world. This self - discovery journey is often a central part of many 'ichigo hunter x hunter fanfiction'.
One common theme is Kalluto's family ties. Since he is part of the Zoldyck family, many fanfictions explore his relationship with his siblings, especially Killua. Another theme is his growth as a hunter. He is still young and has a lot to learn, so stories often focus on his development of nen abilities and his understanding of the hunter world.