Well, it could be really interesting. Maybe it shows a unique interaction between Chara from Storyshift and Sans from Undertale. Their personalities are quite different. Chara can be rather complex and Sans is known for his laid - back yet perceptive nature. So in the fanfiction, there might be a lot of unexpected exchanges and development of their relationship.
Well, some Undertale Chara story fanfictions are about Chara's impact on the other characters. For example, a fanfic might show how Chara's presence affects Frisk's journey through the Underground. It could explore the moral dilemmas that Frisk faces because of Chara. Also, there are fanfictions that rewrite the entire Undertale story with Chara as the central figure, changing the plot and the outcomes of different events.
In undertale chara crossover fanfiction, a cool concept is the power dynamics. Say Chara crosses over into a world with super - powered beings. Chara's determination - based abilities could be pitted against new and strange powers. This can create intense battle scenes and strategic confrontations as Chara tries to figure out how to deal with these new threats or allies.
One idea could be that Chara's parents were great adventurers. They passed on their sense of curiosity to Chara. Maybe they were renowned for exploring the dangerous areas outside their village, and their tales inspired Chara to be brave and explore the Underground later.
The relationship could be complex. Chara's parents could have been loving but also had their own secrets or problems. For instance, they could be involved in some sort of political unrest in the human world that they tried to shield Chara from. But Chara, being perceptive, sensed something was wrong. This added layer of mystery in their relationship could add depth to the fanfiction.
Well, Frisk could be cautious at first. Since Chara in Underswap is different, Frisk might be on guard. However, as they get to know each other, they could become friends. For example, they might share stories about their friends in their respective worlds. Frisk could talk about Sans and Papyrus, while Underswap Chara could talk about their own versions of the characters. Eventually, they could team up to face some challenges in the Underswap world.
It can explore horror. Chara has a somewhat dark and mysterious nature already. In a crossover with a horror - themed world, they could enhance the spooky atmosphere. Maybe they team up with a horror - world character to face an even greater evil, or they could be the source of new terrors.
Another plotline could be that there is a rift in the multiverse, and Chara and Sans are brought together to fix it. Along the way, they discover things about each other's universes and themselves, and in the end, they manage to close the rift and return to their respective worlds with a new understanding of the multiverse.
Frisk and Chara have a complex relationship already in Undertale. When Error enters the picture, it gets even more interesting. Frisk might be the mediator between Chara and Error. Chara could be hostile towards Error initially, seeing him as a threat to their own existence or plans. Error would likely be dismissive of both of them at first, thinking they are just insignificant parts of a world he might want to destroy.
Well, one possibility is that there would be a lot of confusion. Frisk, being the kind-hearted protagonist, might try to reason with Error. Chara, on the other hand, could be more unpredictable. Error might see them as glitches in the fabric of his world - or whatever strange view he has. Maybe he'd try to destroy them at first, but Frisk's determination could change his mind.