Another theme is the exploration of the unknown. Xenomorphs are very different from humans, so fanfics often involve humans trying to figure out the xenomorphs' biology, behavior, and society. For example, in some stories, a human might study a captured xenomorph to learn more about them. This can lead to all kinds of interesting situations and relationships between the two species.
There's a 'human x xenomorphic fanfic' called 'Xeno - Human Bond'. In this story, a group of humans and xenomorphs are forced to cooperate due to a common enemy threatening their existence. It delves into how they overcome their initial differences and form unique bonds.
A common theme is friendship. The human and Mothra often form a deep bond of friendship that helps them face challenges. Another theme is protection. They usually work together to protect the Earth from other threats like other kaiju.
One common theme is friendship. Despite the huge size difference, the giant and the human often form a deep bond of friendship. Another theme is adventure. They usually embark on some kind of adventure together, like exploring a new land or facing a common enemy.
One common theme is cultural exchange. Since humans and eldar have very different cultures, it's often explored how they learn from each other in these fanfics. For example, in many stories, humans might be introduced to eldar art forms or spiritual beliefs, and vice versa.
One common theme is the bond between different species. Since Milotic is a Pokémon and the other character is human, the story often focuses on how they overcome the differences to form a connection.
In 'beans x human fanfic', the theme of transformation can be quite common. The 'beans' might have some sort of ability to transform, or the human might change in some way due to their interaction with the 'beans'. Also, themes of mystery can be present. The 'beans' could be mysterious entities, and the human is trying to figure out what they are and where they come from. And of course, love can also be a theme, whether it's platonic or romantic between the 'beans' and the humans.
In 'pokemon x human fanfic', the theme of protection is prevalent. Humans may protect their pokemon from harm, and pokemon may in turn protect their human partners. This can be seen in many fanfics where they face dangerous situations together. Another common theme is the exploration of different cultures within the Pokemon world. As humans interact with different types of pokemon, they may encounter unique cultures and ways of life that are specific to certain pokemon species or regions.
One common theme is friendship. The relationship between the Leafeon and the human often starts as a simple acquaintance and develops into a deep, meaningful friendship. Another theme is growth. Both the Leafeon and the human usually grow as characters throughout the story.
One common theme is the clash of cultures. Humans and predators have very different ways of life, so exploring how they interact and misunderstand each other is often a big part of these fanfics.
One common theme is the struggle between good and evil. Since demons are often seen as evil in traditional views, the fanfic might explore how a human can influence a demon towards good or vice versa. Another theme is forbidden love. Society in these stories usually doesn't approve of a human - demon relationship.