A really interesting plot could be that Gregory gets lost in the human world during the day. He has to find his way back home while avoiding being discovered by too many humans. He could meet a kind old lady who helps him without really knowing what he is, and through this encounter, he learns more about human kindness.
One idea could be exploring the vampire's family history more in - depth. Maybe there are ancient secrets or rivalries within the vampire clan that the main characters could uncover.
Perhaps the fanfiction could explore a friendship between the little vampire and a human who discovers his secret. They could go on adventures together, with the human helping the vampire understand human emotions better, and the vampire using his powers to protect the human from danger.
One idea could be the little vampire befriending a human who is also a slasher movie fan. They bond over their differences and similarities, like the vampire's nocturnal nature and the human's love for horror. The vampire could show the human the 'vampire version' of horror, which is their everyday life.
A great plot could be that Glamrock Freddy and Gregory find an old animatronic from a previous iteration of the Pizzaplex that holds the key to an ancient mystery. They have to work together to figure out what the mystery is and how to use the key, all while avoiding the other animatronics who are acting strangely.
One idea could be that Vanessa and Gregory are on a mission to uncover the secrets of the old parts of the building they're in. They face various challenges together and their bond grows as they rely on each other's skills. For example, Gregory's quick thinking and Vanessa's knowledge of the place help them avoid the security mechanisms.
One great 'Little Vampire Gregory' fanfiction is 'Gregory's New Adventure'. It takes Gregory into a modern city and shows how he adapts to new technology while still being a vampire. It's really interesting to see how the author blends the traditional vampire traits with modern settings.
One idea could be that Gregory is lost in the spooky FNAF world and Vanessa, who initially seems menacing, actually turns out to be his protector. She could use her knowledge of the place to keep him safe from the animatronics.
I'm not really sure about the specific plot of 'little vampire gregory love story' as it's not a very well - known mainstream story to me. It might be about a vampire named Gregory who falls in love, perhaps with a human or another supernatural being. There could be obstacles like the differences between their worlds, and how they overcome them to be together.
Maybe the OC has a special power or ability that Rudolph needs. For example, the OC can sense when danger is near. They team up to protect Rudolph's vampire family from a group of hunters who have come to town. As they work together, a deeper bond forms between them.
One idea could be to write about the little vampire's first day at a human school. He has to hide his fangs and his love for blood while making friends. It would be full of comical situations like when the cafeteria serves steak and he has to resist the urge to pounce on it.