One possible theme is friendship. Despite their different origins - Future Trunks being a Saiyan from the future and Android 18 being an android created by Dr. Gero - they could develop a deep friendship. This friendship might be based on mutual respect for each other's strength and abilities.
There's a fanfiction titled 'Unlikely Love'. In this story, Mirai Trunks and Android 18 are brought together by a strange time - travel anomaly. The story focuses on how they overcome their initial distrust. Android 18 is initially wary of Trunks due to his Saiyan heritage, but as they spend more time together, they realize they have more in common than they thought. It's a heartwarming tale of two very different characters finding love.
Perhaps it's a story of love and redemption. Future Trunks, with his tragic past, might find solace and a new purpose in life through his relationship with Android 18. She, on the other hand, could be softened by his kindness and start to see the world in a different light.
One popular Android's Trunks fanfic could be 'Trunks' New Adventure'. It might explore Trunks in a new and exciting situation, like facing an unexpected threat in a different timeline. Another could be 'Trunks and the Android Alliance', which could focus on his relationships with the androids in a more in - depth way.
The relationship in fanfictions usually develops in a rather complex way. It can be influenced by the overall plot of the fanfiction. For instance, if the story is set in a world where they have to protect a certain group of people together, they will be forced to communicate and cooperate. During this process, Mirai Trunks may be attracted to Android 18's independence and strength, while Android 18 may be intrigued by Trunks' courage and his ability to adapt to difficult situations. Over time, their interactions become more frequent and intimate, leading to the development of their relationship.
Well, when starting an Android's Trunks fanfic, you need to do your research on the Android and Trunks lore. This includes understanding the technology of the androids, their motives, and how Trunks fits into that world. Then, think of a unique angle. Maybe Trunks has a secret power that he discovers while fighting the androids. You can start writing by creating a mood. For instance, if it's a dark and tense fanfic, start with a description of a desolate landscape where Trunks is about to face an android threat. Then, gradually introduce the story elements, like the appearance of the android and Trunks' reaction.
Growth and self - discovery are also prevalent themes. The characters of Pan and Trunks are still young and have a lot to learn about themselves and their powers. In many 'pan x trunks fanfic', they go through journeys that help them understand themselves better, and this is often intertwined with their relationship with each other.
One interesting 'Trunks x Broly' fanfiction could be where Trunks tries to redeem Broly. He might use his intelligence and his own strength to reach out to Broly's better side. In this fanfiction, they could start off as enemies but gradually develop a bond as they face common threats together.
One possible storyline could be that they accidentally have a child and then have to deal with the consequences in a world full of Saiyan politics and power struggles. For example, how would Vegeta react to his grandson being born in such unexpected circumstances?
One common theme is growth. Both characters often grow as individuals and in their relationship. For example, they might learn to overcome their personal fears or weaknesses while falling in love. Another theme is adventure. They usually embark on some sort of journey or face challenges together, which brings them closer.