One theme that shows up a lot is sacrifice. Killua's willingness to sacrifice for Gon and vice versa is a big part of their relationship. In fanfictions, this can be magnified, with one sacrificing in a more extreme way for the other's well - being or for the sake of their relationship. Also, self - discovery is a theme. As they grow closer, they might discover new things about themselves and their feelings for each other.
The theme of protection is quite prevalent. Killua is very protective of Gon, and in fanfictions, this protection can take on different forms. It could be protecting Gon from physical harm, or from emotional distress. Additionally, the theme of loyalty is often explored. Their loyalty to each other is a cornerstone of their relationship, and fanfictions may test or expand on this loyalty in various scenarios.
Friendship is a very common theme. Since Gon and Killua have such a strong bond in the original work, fanfictions often explore different aspects of their friendship, like loyalty and mutual understanding.
One common theme is the exploration of their deep friendship evolving into romantic feelings. Often, it's about the moment when they realize their connection is more than just friendship. Another theme could be about them overcoming some external obstacle together, and the kiss is a celebration of that victory.
A very common theme is the exploration of unspoken emotions. In the original 'Hunter x Hunter' series, there are a lot of feelings between Killua and Gon that are not fully expressed. In fanfiction with a kiss, it's a way to finally let those emotions out. There can also be the theme of forbidden love in some cases, where they might face challenges or opposition to their relationship, and the kiss is a rebellious act against those constraints.
Gon in fanfiction can be very single - minded in his pursuit of goals, just like in the original. He might be a bit more naive at times, which can lead to interesting plot twists. Killua is often portrayed as having a complex emotional side. He struggles with his past as an assassin and his loyalty to Gon. His cool exterior may crack in some fanfictions, showing his true feelings.
Another theme is jealousy. When other characters get too close to Gon, Killua's possessive side flares up. This can lead to some interesting conflict and drama within the story. For instance, if Gon makes a new friend that Killua perceives as a threat to their relationship, there will be some tension between 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.
In 'killua x gon fanfic', the theme of sacrifice often appears. Killua or Gon might sacrifice something for the other's well - being. Another common theme is the power of their bond. It's often shown as something that can overcome great obstacles. And there's also the theme of shared dreams. They both have goals as hunters, and fanfics may explore how they pursue these dreams together or support each other in achieving them.
Friendship is a very common theme. Their strong bond is often explored further in fanfictions. Another common theme is growth, as they both grow in strength and character throughout the original series, and fanfictions like to expand on that. Adventure is also common as they are hunters.
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.
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.