One popular theme is adventure. Since Gon and Killua are often on adventures in the original story, fanfictions may continue this trend while adding the element of Hisoka's interference. Another theme is the exploration of power dynamics. Hisoka is much more powerful than Gon and Killua at first, so how they grow to face him or interact with him in terms of power is interesting.
The relationships in 'hisoka x gon x killua fanfiction' can vary greatly. Some fanfictions might focus on a possible rivalry between Hisoka and Killua over Gon. Hisoka may see Killua as an obstacle to his 'play' with Gon. Meanwhile, Gon might be oblivious to the full extent of Hisoka's intentions. This creates a dynamic triangle where different emotions like jealousy, friendship, and obsession play out, making for a very engaging read.
One great Gon x Killua x Hisoka fanfiction is 'Unlikely Alliances'. It explores their complex relationships in a unique adventure setting. The story does a wonderful job of showing how Gon's pure heart, Killua's loyalty, and Hisoka's unpredictability interact in different situations.
One common theme is the exploration of power dynamics. Hisoka is much more powerful than Gon and Killua at first, so fanfics often play with how they either try to overcome this gap or how Hisoka uses his power in relation to them.
In 'killua x gon lemon fanfiction', a recurring theme is the protection of one another. In the original story, they already show a great deal of loyalty and a desire to protect. In these fanfictions, it can be amplified, especially in situations where their relationship is at stake. There might also be themes related to the contrast between their different personalities - Killua's more cautious and Gon's more impulsive nature - and how they complement each other in their relationship.
Adventure is also a big theme. The two characters are known for their adventures in the Hunter x Hunter world. In fanfics, their relationship can be developed during these adventures, like facing challenges together and growing closer. It might be that they discover new things about each other and their feelings while on a quest or in a dangerous situation.
I haven't come across a 'Giant Dick Killua x Gon Fanfic'. Fanfics usually range from various genres like adventure, friendship - enhancing, or alternate universe stories. A title like this seems rather out of the ordinary and not in line with the general positive and respectful nature of most fan - created works. So, it's likely not a common or widely available one.
The common themes include the growth of their relationship. Starting from their initial acquaintance in the series, fanfics show how their relationship evolves into a romantic one. Trust is another big theme. They have to trust each other not only as friends but also as lovers. And many fanfics also touch on the theme of sacrifice. They might be willing to sacrifice for each other's happiness in a more romantic - relationship - based scenario, which is an extension of the selfless friendship they had in the original anime.
Many of these fanfictions also play with the idea of their growth as individuals within the context of their relationship. As Gon and Killua grow in power and experience in the 'Hunter x Hunter' world, their relationship also evolves in these fan - created stories. This can include how they deal with their own insecurities and how they support each other during difficult times.