Definitely Freddy and Bonnie are among the most popular. But also Golden Freddy, when turned human, has an air of mystery around him. People are drawn to his story because in the original FNAF, he had a lot of lore. When human, his backstory can be further explored, like what made him so special as an animatronic and how that affects him as a human. And the same goes for the Puppet. It has a deep and complex backstory in the FNAF world, and as a human, there are many directions a story can take with it.
Freddy is often a popular character. His human animatronic form might be depicted as having a mysterious past, like he was once a normal human who was transformed into an animatronic against his will.
Freddy is often a very popular character. In the human animatronic version, he might be seen as the leader, with his charm and charisma still intact even in his new form. He could be the one making important decisions for the group of human animatronics.
One interesting concept could be the backstories of the human animatronics. For example, how they came to be in the form of animatronics. Maybe they were part of some experiment gone wrong in a spooky pizzeria.
In 'FNAF Turned Human Fanfiction', a great plot idea could be the human - turned - animatronics trying to find a way back to their original forms. They could face challenges like discrimination from humans who remember them as terrifying animatronics. Also, their new physical forms might have some special abilities or weaknesses that add to the story.
A possible plot in fnaf human animatronucs fanfiction is that the human animatronics develop emotions that are too strong for their mechanical bodies to handle. For example, they feel love, hate, or extreme jealousy. This could lead to conflicts among them and with the humans in the pizzeria. They might have to find a way to either control their emotions or upgrade their bodies to be able to handle them.
The animatronics themselves can be considered main characters in a way. Freddy Fazbear, Bonnie the Bunny, Chica the Chicken and Foxy the Pirate Fox play significant roles. They are the sources of horror, with their own distinct personalities (although they are haunted and menacing) in the stories. For example, Freddy is often depicted as the leader among them, and his appearance is always a sign of great danger.
Well, a very common theme is the relationship development. At first, the male human may be scared of Bonnie like in the original 'Five Nights at Freddy's' setting. But as the story progresses, they start to understand each other. There could be cultural differences explored too, as Bonnie is an animatronic from a very different world compared to the human. And of course, there could be themes of self - discovery for both characters as they interact more and more.
The main characters usually include the night guards. They are the ones who have to endure the terrors of the haunted animatronics during their shifts at Freddy Fazbear's.