One common theme is identity. Harry has to figure out who he is as an alien in a world that already sees him as a wizard. Another theme is acceptance, as he tries to get others to accept his alien nature.
In many 'Harry is an Alien' fanfictions, the theme of discovery is prominent. Harry is constantly discovering new things about his alien heritage, like his species' history, culture, and unique abilities. There's also the theme of adaptation. He has to adapt to his alien self while still living in the wizarding world. This can involve changing his way of thinking, his magic use, and how he interacts with others. Another theme is the clash of two different worlds - the alien world and the wizarding world. How these two worlds' rules and values interact and sometimes conflict is an interesting aspect that many of these fanfictions explore.
One common theme is the idea of acceptance. The abdl characters often have to find acceptance in an alien society that may or may not understand their needs. For example, in some stories, the aliens are initially confused by the human's abdl behavior but later come to accept it.
Survival is also a major theme. The presence of aliens usually brings some sort of danger, and the characters from Twilight have to find ways to survive this new threat. They may have to adapt their ways, form new alliances, or even discover new powers within themselves. This theme of survival adds a lot of tension and excitement to the 'alien twilight fanfiction' stories.
Since we should avoid adult content, in general alien - themed stories often have themes like exploration, first contact, and cultural differences. For example, in 'Contact' by Carl Sagan, the theme of communication with an alien race is explored.
Adventure is another common theme. Bella usually finds herself in a strange alien world or on an exciting journey with aliens, like exploring uncharted planets or facing off against alien threats.
One common theme is the clash of cultures. When two different alien - related universes collide in fanfiction, there's often a struggle between different ways of life, technologies, and values. For example, if you cross 'Star Wars' aliens with 'Alien' creatures, you'll have the peaceful and sometimes spiritual Jedi dealing with the purely survival - based and menacing Aliens.
One common theme is identity. Female aliens often struggle to figure out who they are, especially if they are part - human or in a human - dominated environment. Another theme is acceptance. They may face discrimination or fear from others and have to fight for acceptance.
One common theme is the clash of cultures. You have the human culture, which is often based on community and cooperation, and then you have the predator culture, which is centered around hunting and honor. In 'alien predator fanfiction', this clash can lead to all sorts of interesting situations. Also, the theme of adaptation is quite prevalent. Characters, whether they be human, alien or predator, have to adapt to new environments or situations. For example, a human in a predator - dominated world has to adapt to their rules of survival. There's also the theme of discovery, as characters discover new abilities, new species or new technologies within the 'alien - predator' universe.
One common theme is the exploration of the unknown. Since it involves aliens, there's always that sense of discovery. Another is the idea of forbidden love, as the relationship between a human and an alien is often seen as something not quite normal in society.
One common theme is survival. Whether it's the female xenomorph trying to survive in a hostile human - dominated world or humans trying to survive against the female xenomorph. Another theme is power. The female xenomorph is often depicted as a very powerful being with unique abilities.
Another theme is the concept of adaptability. The human has to adapt to the alien environment, culture, and way of life. And sometimes the alien also has to adapt to the human's strange habits. It can lead to some really funny and heartwarming situations. For instance, in a story, the human likes to sing which the alien finds very strange but also endearing.