One aspect that could make the Elizabeth Afton novel interesting is her character. If it's like the rest of the Five Nights at Freddy's related works, her story might be full of twists and turns. Her connection to the animatronics alone can be a fascinating point to explore.
I'm not very familiar with a specific 'Elizabeth Afton novel'. But generally, if it's related to the Five Nights at Freddy's universe where Elizabeth Afton is from, it might be filled with horror and mystery elements, perhaps exploring her character, her experiences in the creepy animatronic - filled world, and how she fits into the overall dark story of the franchise.
Well, it could be a really wild plot. Maybe the Afton family members from their own dark and creepy world encounter various Creepypasta characters. There could be a battle of who's scarier or they might team up for some strange and evil purpose. For example, the Afton family's murderous tendencies could be combined with the unique and often disturbing powers of Creepypasta entities like Jeff the Killer or Slenderman. It would be a chaos of different horror elements colliding.
The interaction between the Afton family's children, such as Elizabeth Afton, and the female Creepypasta characters like Jane the Killer could be really engaging. Elizabeth has her own dark backstory within the Afton family lore, and Jane is a strong - willed and vengeful Creepypasta character. They could either become enemies or find some sort of strange kinship in their shared experiences of being part of a dark and often male - dominated world of horror.
The fem gymnastics reader could be curious. Despite the differences in the two areas, she may want to explore this new type of fanfiction. Maybe she'll be interested in how the writers create such a spooky atmosphere and unique characters in creepypasta fanfiction.
Diane would probably be overjoyed. She's always been close to Meliodas and Elizabeth, and she would likely offer to protect them and help out in any way she can. Maybe she'd use her giant strength to build a special place for them to stay during the pregnancy.
She could be fascinated. Despite the contrast, the unique and often complex storytelling in creepypasta might draw her in. She might start to analyze how the authors create such an intense atmosphere, which could be different from any analysis she's done in relation to gymnastics, but still engaging in its own way.
Their pirate friends would probably be both excited and a bit clueless. Jack Sparrow might try to give the baby some 'unique' gifts like a small piece of treasure or a strange trinket. Gibbs would offer practical advice on how to keep the baby safe on a ship if they ever take it to sea.
Ban would probably be excited and start thinking about all the fun things he could teach the baby, like how to steal food without getting caught in a humorous way. King might be a bit more reserved at first but then offer to make the most beautiful crib with his powers. Diane would be super excited and offer to babysit all the time, cooing over how cute the baby will be.
Besides William Afton, the 'william afton fnaf graphic novel' could feature a host of characters. The animatronics are likely to be major players. Freddy, with his leadership among the animatronics, might be important. Bonnie, the guitar - playing bunny, and Chica, the chicken. There could also be human characters such as the original founders of the Freddy Fazbear's franchise who might have had some connection with Afton. Additionally, any characters who have tried to solve the mysteries surrounding the spooky events at the pizza places could be part of the main cast.