Another relationship they could have is that of comrades. In a fanfic, they could be united by a common goal, like protecting the Earth from a new and dangerous threat. They would support each other in battles, with Goku using his brute force and Android 21 using her strategic thinking and powers. Their relationship would be based on mutual trust and respect for each other's abilities.
A possible relationship could be a friendly rivalry. They are both powerful in their own ways. Goku is a Saiyan with incredible physical strength and combat abilities, while Android 21 has her own set of unique powers. They might constantly challenge each other to friendly spars, which would help them both improve their skills and also deepen their understanding of each other.
One possible plot could be a story of Goku and Android 21 teaming up against a new and powerful enemy. They start off as reluctant allies. Goku is initially wary of Android 21 due to her being an android, but as they face challenges together, they begin to understand and respect each other's powers. They could learn new techniques from one another and in the end, become friends. This would be a great way to show their growth and the power of friendship across different species in the Dragon Ball universe.
They could go on a quest to find a powerful dragon ball that has been lost. Goku's sense of adventure and 18's combat skills would be a great combination. Along the way, they would face various enemies. Goku would use his super - fast speed and powerful attacks, while 18 would use her android abilities like energy absorption to deal with the threats.
Well, it could be a relationship based on power dynamics. Goku is extremely powerful, and Android 21 is no slouch either. They might engage in battles that gradually turn into a form of respect for each other's abilities. And then, this respect could evolve into a deeper connection. For example, Goku could teach Android 21 about the joys of a fair fight, and she could in turn show Goku some of her unique Android - related skills or knowledge.
One possibility could be a story where Android 21, with her unique powers and intelligence, teams up with Goku to face a new and powerful enemy. Maybe they start off as reluctant allies, with Goku being a bit wary of Android 21's past as an android. But as they fight together, they learn to trust each other and their combined strength becomes a force to be reckoned with.
A possible plot could be that Android 18 and Goku are thrown into an alternate dimension where they have to rely on each other to survive. In this dimension, they face challenges that test their friendship and fighting skills. Android 18 might learn some of Goku's signature moves and Goku could learn more about the technology within Android 18.
Character development is key. In a good 'Goku x Android 18 fanfic', we should see both characters grow and change because of their relationship. For example, Goku might become more in - tune with his emotions, and Android 18 could become more open. Also, an interesting plot that goes beyond the typical fight - and - save - the - world scenario is great. Maybe something like them exploring a new world together or having to solve a mystery.
Well, their relationship in fanfiction could be really interesting. Goku is a powerful Saiyan with a pure heart and a love for fighting strong opponents. Android 21, on the other hand, has her own complex personality. In fanfiction, they might start as adversaries. Maybe Goku initially sees her as a threat due to her Android nature. But as the story unfolds, he could discover her softer side. They might bond over their shared experiences of dealing with powerful foes and the challenges that come with their respective existences.
It might also be a story about self - discovery. Android 18 could be exploring her more human side with Goku's influence. Goku, on the other hand, could learn more about the androids and how they are not all just mindless killing machines. The 'lemon' aspect might imply some sort of budding relationship that is full of passion and challenges as they come from very different backgrounds.
Their relationship could develop into a deep friendship. Goku, being the kind - hearted fighter he is, would likely accept Android 18 for who she is. And Android 18, seeing Goku's strength and good nature, would start to respect him more and more.
There is a fanfic called 'Beyond the Battlefield'. In this story, Goku and Android 18 are forced to team up for a mission. As they work together, they start to understand each other better. The author does a great job of writing their dialogues, which are full of humor and some underlying tension.