Another theme is adventure. Writers often send them on exciting quests together. They could be traveling through different lands, facing various challenges like dangerous monsters or tricky puzzles. This allows for a lot of action - packed storytelling and showcases their individual skills.
To develop their relationship further in a fanfic, you could start with them having some sort of misunderstanding. Maybe Ashi misinterprets one of Jack's actions. This creates tension which they then have to work through. It shows their ability to forgive and understand each other. Also, having them take care of each other when one is injured or sick can strengthen their bond. And they could exchange cultural knowledge, Jack sharing his samurai heritage and Ashi sharing the knowledge of her former cult. This would bring them closer as they learn more about who they are as individuals within the relationship.
Fanfiction.net also has a collection of ashi x jack fanfiction. You may need to use the search function and filter through the results. Some stories could be about them teaming up against a common enemy, showing their combined strength and the development of their bond during the fight.
One plot idea could be Jack and Ashi exploring a new, uncharted land together. They face strange creatures and have to use their combined skills to survive. Another could be a story where they go back in time to prevent a certain event that would have a huge impact on their future. And a third idea is that they have to protect a magical artifact from an evil force, with their relationship growing stronger throughout the adventure.
In a Samurai Jack and Ashi pregnancy fanfiction, the story might focus on how their different upbringings affect their approach to the pregnancy. Ashi, coming from a dark past, might initially be afraid of being a mother. But with Samurai Jack's support, she could gradually embrace the idea. They could also have to deal with the reactions of their friends and allies in this new chapter of their lives.
A great Samurai Jack and Ashi love fanfiction would likely focus on the emotional journey of their relationship. For example, it might start with Ashi being sent to kill Jack but instead finding herself drawn to his honor and kindness. Their love could be a symbol of redemption for Ashi, as she breaks free from her dark past. And for Jack, it could be a new beginning, a chance to have a connection in the desolate world he has been wandering in for so long.
The appeal lies in the contrast between the two characters. Samurai Jack is a paragon of virtue, while Ashi was initially a tool of evil. Their love in fanfiction represents the power of change and redemption. It's exciting to see how they interact and how their relationship evolves from hostility to love.