It's the personalities of the characters. Sans is a fan - favorite with his cool - headedness and dry humor. Bill Cipher is this all - powerful and unpredictable being. Putting them together in a fanfiction means there will be unexpected twists and turns as their personalities clash or, surprisingly, find common ground.
Well, in a 'sans meets bill cipher fanfiction', there could be some really interesting interactions. Sans, from Undertale, is known for his laid - back yet mysterious nature, while Bill Cipher from Gravity Falls is this chaotic and powerful entity. The fanfiction might explore how Sans would react to Bill's mind - games and manipulations. Maybe Sans would use his unique abilities like teleporting and bone attacks to counter Bill's tricks. It could also be a story of an unlikely alliance between the two, or perhaps a battle of wits and powers that keeps readers on the edge of their seats.
In the 'bill cipher meets black hat fanfiction', it could start with Bill Cipher getting bored in his own dimension and decides to explore other realms. He stumbles upon Black Hat's domain. At first, Black Hat is hostile towards this strange triangular entity. But Bill Cipher, being his glib self, tries to convince Black Hat that they could achieve greater things together. Black Hat, seeing the potential of Bill's powers, reluctantly agrees. Then they embark on a journey of causing chaos across different universes, with each having their own motives hidden beneath their new - found partnership. Their interactions would be filled with mistrust and power plays as they constantly try to one - up each other while still maintaining their joint goals of destruction and domination.
I'm not entirely sure specifically what that fanfiction is about. It could potentially be about Bill Cipher achieving or obtaining Will Cipher in some way, perhaps in a strange or otherworldly scenario within the context of the Gravity Falls universe. It might involve some sort of power play or a very unique plot device that only fans who have read it would know for sure.
Lincoln is a down - to - earth kid who values family and normalcy. Bill Cipher, on the other hand, is a chaotic and malevolent being. So, Lincoln would be constantly trying to bring order and protect what he loves, while Bill would be all about disrupting that order just for fun.
A good Bill Cipher x OC fanfiction often has a well - developed OC. The OC should have a distinct personality, backstory, and set of abilities. For example, if the OC has the ability to resist Bill's mind - control, it can lead to some really interesting power struggles.
One aspect of Bill Cipher and Dipper fanfiction is the exploration of their complex relationship. Bill is often depicted as a menacing and powerful entity, while Dipper is curious yet cautious. In many fanfictions, Dipper might be lured into Bill's schemes, creating a lot of tension and drama. It's a great way to expand on the personalities and potential interactions that were only hinted at in the original show.
One great Bill Cipher fanfiction is 'The Cipher's Game'. It has an interesting plot where Bill interacts with the main character in a dream - like world filled with strange and mind - bending challenges. The author does a wonderful job of capturing Bill's chaotic and mischievous nature.
Bill Cipher would probably be the more dominant character. His powers are not of this world. He can create and destroy entire universes if he wants. Black Hat, while very evil and powerful in his own right, is more limited to his own domain and the physical world in a sense. Bill Cipher can pop in and out of different dimensions, change the laws of physics, and manipulate minds on a grand scale. Even if Black Hat tries to outwit him, Bill Cipher can simply change the rules of the game. So, overall, Bill Cipher's almost god - like powers would likely make him the more dominant one in this fanfiction scenario.
Dipper Pines could be one of the main characters. He might be the one who first discovers Bill's transformation and tries to figure out if it's a trick or if Bill is truly changing. His inquisitive nature would make him a great foil to Bill's new human self.
I think Kakashi would also be a great character to pair with Bill Cipher. Kakashi is very intelligent and experienced. His encounter with Bill Cipher would be full of mind - games as he tries to figure out Bill's motives and powers while also protecting the village from Bill's chaos.