Well, clearly Trunks and Pan are the main characters. Trunks is a half - Saiyan with a strong sense of justice and great power. Pan is also a Saiyan - human hybrid, full of energy and determination. Their different personalities and abilities make them interesting to write about in fanfiction.
A plot could be that Pan discovers a hidden power within herself and Trunks helps her to control it. They might have to go to a special place, like an ancient temple, to fully understand and master this power. Along the way, they face challenges from other characters who are either jealous or want to use this power for their own evil purposes.
A possible fanfiction could be set in a future where Pan discovers a hidden power within herself. Trunks, being the more experienced one, helps her control and master it. They could face off against a new, mysterious enemy together, and through their battles and shared experiences, their relationship deepens as they rely on each other's strengths.
One interesting storyline could be Trunks and Pan going on a time - traveling adventure together. They might visit different eras in the Dragon Ball universe and face various challenges that were not part of the original story. For example, they could end up in a time when the Saiyans were still on Planet Vegeta and have to figure out how to get back home without disrupting the timeline too much.
In some fanfictions, there could be a rogue Android. This Android might have been created by a mad scientist and has its own agenda. It could be super - strong and intelligent, constantly devising plans to either destroy Trunks and Pan or use them to achieve its own goals. Maybe it wants to use the Dragon Balls to upgrade itself further and become invincible.
One common theme is growth. They both grow as characters, whether it's in terms of their fighting abilities or their emotional maturity. For example, in many fanfictions, Trunks helps Pan to become a better fighter and Pan helps Trunks to open up more emotionally.
One idea could be a time - travel fanfic where Pan accidentally travels back in time and meets a younger Trunks. They could go on an adventure to fix a timeline glitch that could endanger their future.
One interesting storyline could be Trunks and Pan going on a quest to find a rare Dragon Ball that has been lost in a parallel dimension. They face all kinds of strange creatures and challenges along the way.
Well, perhaps in this fanfiction, Pan and Trunks start off as friends but then gradually realize they have stronger feelings for each other. They could be exploring an ancient ruin where they find a power that binds them in a unique way. Their relationship might then be tested when an old enemy resurfaces and tries to drive them apart by using their new - found bond against them.
Their relationship could develop through training together. As they train, they learn to respect each other's abilities more. For example, Trunks might be impressed by Pan's tenacity and Pan could admire Trunks' strength.