Well, in fanfiction, Springtrap can be seen as a symbol of the horror that lurks within the Freddy Fazbear's franchise. His character is often explored in relation to themes like death, revenge, and the consequences of past sins. Writers might give him unique abilities, such as the ability to move silently or to manipulate the environment to his advantage. His backstory, which is full of mystery in the original game, is often expanded upon in fanfiction, which can add depth to his character.
In fanfiction, Springtrap and Mangle often appear in some really interesting scenarios. Some fanfictions might focus on their spooky interactions within the dark and eerie setting of the FNAF world. They could be depicted as having a sort of rivalry, given their different natures in the original game lore.
One possible plot could be that Naruto is somehow transported to the world of Five Nights at Freddy's. He wakes up inside the dilapidated building as Springtrap. Maybe it's a result of some jutsu gone wrong or a powerful enemy's curse. Naruto, now in the form of Springtrap, has to figure out how to break the spell while also dealing with the animatronics that are out to get him. He might use his ninja skills in unexpected ways, like using chakra to control the movements of Springtrap more effectively or using his stealth abilities to avoid detection by the other animatronics.
One common theme is the battle of good and evil. Foxy might be seen as a more 'good - ish' character compared to the clearly menacing Springtrap. Another theme could be redemption, where Springtrap might have a chance to change through his interactions with Foxy.
One common theme is horror. Given their spooky appearances in the game, fanfictions often use them to create a sense of dread. Another theme could be mystery, as there are many unknowns about their characters. Writers may also explore themes of survival, as if they are both trying to survive in the haunted environment of the FNAF world.
It would be really weird. Harry Potter as Springtrap would mean a total transformation of his character. He'd go from a young wizard to a creepy animatronic - like being. Maybe the story could involve some dark magic that turns him into this strange form and he has to navigate both the wizarding world and this new, horrifying state.
One common theme is redemption. Springtrap is often portrayed as a character who has done bad things in the past, and through his relationship with the reader, he tries to make up for it. Another theme is the exploration of the unknown. Since Springtrap is a rather mysterious and spooky character, the fanfiction often dives into the secrets he holds. Also, the theme of acceptance is present. The reader usually accepts Springtrap for who he is, despite his flaws and his dark past.
A possible plotline is that Springtrap sees Deliah as a way to break free from his current trapped state. He may manipulate her at first, but as time goes on, he starts to develop real feelings for her. Meanwhile, Deliah is constantly in a struggle between her fear of Springtrap and her growing empathy for him.
I'm not entirely sure as there could be various 'Springtrap' novels. It might be about the character Springtrap from the Five Nights at Freddy's series. Maybe it focuses on the dark and spooky events related to Springtrap, like his origin, his actions within the haunted pizzeria, or his encounters with other characters in the FNAF universe.
Often, an original female character created by the author is paired with Springtrap. This gives the writer a lot of freedom to shape the relationship. Another possibility is a brave and curious male character who is intrigued by Springtrap and falls in love with him.
Often, such a pairing in fanfiction is used to explore the darker aspects of the FNAF universe. Their interaction might be filled with tension and mystery. Some fanfictions may show them as rivals who constantly try to outwit each other. This rivalry could be based on their different natures, with Golden Freddy having his own spectral qualities and Springtrap being more of a physical, yet decayed and menacing, presence.