One reason could be that she's been really busy and hasn't had time to eat. For example, if she's a student cramming for exams all day long, she might forget to eat and her stomach would growl as a result.
It could also be due to nervousness. In a story, the girl might be in a very stressful situation, like about to give a speech or take an important exam. The nerves can affect the digestive system and make the tummy growl.
Another possibility is that it is a sign of an illness. In some fanfictions set in a more magical or science - fiction world, an unusual stomach growl could be the first symptom of a strange disease or the result of a curse. For example, it could be a curse that slowly eats away at the character's insides, and the growl is the manifestation of that.
A girl was on a first date at a fancy restaurant. She was so nervous that she didn't eat much of the appetizer. When the main course was about to come, her stomach growled so loudly that the guy across from her couldn't help but laugh. She was mortified at first but then they both ended up having a good laugh about it.
In a fanfic, Naruto's stomach growls while he's spying on an enemy. The growl almost gives away his position, but he manages to cover it up by making a fake animal noise. Then, he has to find a way to get some food without being detected so his stomach doesn't betray him again.
In some Harry Potter fanfiction, his stomach growl could be a sign of the meager meals at Hogwarts. Maybe it growls during a long and intense Quidditch practice when he's too focused to eat before. It adds a bit of realism to the magical world.
Maybe she ate something bad like spoiled food or food she was allergic to.
Well, you could write a fanfiction where the stomach growl of the character attracts the attention of a friendly but strange creature. This creature could help the character find food in exchange for something. For example, the character might have to solve a riddle for the creature.
One possible fanfiction could be about the main character in Little Nightmares constantly having their stomach growl as they navigate the spooky world. It could add to the sense of desperation and hunger they already feel. Maybe they come across a mysterious food source, but it turns out to be a trap.
Well, some Supernatural fan communities on social media platforms might also be a good place to find such fanfiction. For example, on Tumblr, there are often groups dedicated to sharing and discussing unique Supernatural fanfics. You can post a request there for stomach growl - related fanfiction. Also, Reddit has some Supernatural sub -reddits where fans might have shared or can recommend such stories.
In some cases, the stomach growl might be part of a magical or cursed situation. Maybe a character has been cursed so that their stomach growls at inopportune times, causing trouble or embarrassment. Or it could be a side - effect of some supernatural power they've acquired. This can add an interesting twist to the story and explore how the characters deal with this strange new development within the framework of the Supernatural series.