Often, they show a deeper level of commitment. The mpreg forces them to rely on each other more. For example, Gon might become more protective of Killua during the pregnancy.
Well, some plots might involve Gon and Killua facing the challenges of a new family life together. They could be dealing with the reactions of their friends in the Hunter world. Maybe there are stories where they have to protect their new family from enemies who see their situation as a weakness.
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.
There are many great 'Killua x Gon' fanfictions that focus on their friendship and adventures. For example, some stories might explore their further training together, delving into new techniques they learn and how they support each other in the face of stronger opponents. Another type could be about them traveling to new and mysterious lands within the 'Hunter x Hunter' universe, encountering unique creatures and cultures.
In 'killua x gon fanfiction', one characteristic is the exploration of their relationship in different scenarios. It could be in alternate universes where they face new challenges. Also, their friendship is often romanticized to some extent, with the authors delving into the unspoken feelings they might have for each other. Moreover, the fictions usually stay true to their personalities as shown in the original anime, while adding new layers to them.
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.
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 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.