What are the common themes in pregnant Killua fanfiction?

One common theme is power - up. When Killua crosses over into another universe, he often gains new abilities or finds ways to enhance his existing ones. For example, in a crossover with a superhero universe, he might learn to control a new type of energy. Another theme is friendship. He forms new bonds with characters from the other universe.

Friendship or brotherhood is also a big theme. Despite their differences, many fanfictions show how they support each other in their own ways, like Killua relying on Illumi's skills in certain dangerous situations and Illumi having a soft spot for Killua deep down.

Adventure is also a common theme. The characters from Killua's world and RWBY's world going on quests together. They might be on a mission to stop a powerful enemy that threatens both their universes. This usually involves a lot of action scenes, battles against unique and powerful foes. And of course, there's often some element of mystery, like trying to figure out the secrets of the other world or the true motives of certain characters in the crossover.

Another theme is friendship. Killua is used to a certain type of friendship from his own story, and when he meets RWBY characters, new bonds are formed. It's about how he adapts to their group dynamic and vice versa. For example, his relationship with Ruby, who is very different from his friends back home.

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.

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.

A common theme is family. Given their complex family situation in the original story, fanfictions often explore how Killua and Alluka's relationship affects and is affected by their family. Another theme is protection. Killua is very protective of Alluka, and this is often a central aspect in these fanfictions.

Love and loyalty are themes that are often explored as well. It's not always romantic love, but a deep, unwavering loyalty that might exist between them. Some fanfictions show how, despite their differences, they would still be there for each other in difficult situations, like when facing a common enemy or dealing with the challenges within their family.

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.