Adventure is also a popular theme. They go on quests together, facing powerful enemies and exploring new places. This allows for a lot of action and character development.
Love or a deep emotional connection is another theme. Some fanfics explore the romantic feelings that might develop between Killua and the OC, while others focus on a more platonic but still very strong bond.
The theme of loyalty is quite prevalent too. The OC and Killua form a bond where they are loyal to each other. Also, the idea of power and how to control it or use it for good often comes up. As they face various challenges, they have to figure out how to use their powers effectively and not let it corrupt them, all while their relationship grows and changes.
One common theme is self - discovery. The OC often discovers new things about themselves while being with Killua. Another theme is friendship evolving into something more. For example, they start as friends or allies and then gradually develop romantic feelings. Also, there's the theme of overcoming differences. Since the OC is not from the original story, they usually have different values or abilities than Killua, and they have to overcome these differences to be together.
One common theme is adventure. Since Killua is from the Hunter x Hunter universe which is full of dangerous quests and exploration, many 'killua zoldyck x oc fanfiction' stories involve the OC joining him on these adventures. Another theme is friendship evolving into love. The OC and Killua start as friends or allies and then their relationship deepens over time.
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.
One common theme is the exploration of power dynamics. Hisoka is much more powerful and experienced, and Killua is a prodigy. Their relationship often involves Hisoka testing Killua's limits. Another theme is the idea of redemption or change. Hisoka is a rather amoral character, and in some fanfics, Killua might influence him to change for the better.
One common theme is friendship. The SI OC often forms a deep bond with Killua, and they go through various adventures together, relying on each other. Another theme could be self - discovery. As the OC is in a new world with Killua, they learn more about themselves.
Adventure is also very common. The OC usually gets involved in Killua's dangerous and exciting world of being a Hunter. They might be on a mission to find a rare item or defeat a powerful enemy. And there's often a theme of trust - building. Killua has to learn to trust the OC and vice versa.
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.
One common theme is adventure. Since the Hunter x Hunter world is full of dangerous and exciting places, fanfics often have the reader and Killua going on quests or exploring new areas. Another theme is friendship. They start to build a strong bond as they face different challenges together.
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.