The kids she babysits are also important characters. Each kid could have a different reaction to finding out their babysitter is a vampire. One might be scared at first but then become curious, while another could be immediately accepting and even excited about it.
Obviously, the vampire babysitter herself is a great character to focus on. You can explore her internal struggles, like how she balances her vampire instincts with her job of taking care of the kids.
Based on the title, it seems that Benny and the babysitter are the main characters. Since it's a vampire fanfic, there might also be some vampire characters who play important roles, but they are not directly mentioned in the title.
Definitely the babysitter. Writers can explore her backstory, her struggles with being a vampire and trying to fit into the human world while babysitting. The main kid she babysits is also a popular choice. He's the one who has the most interactions with the babysitter and often gets into crazy situations because of her vampire nature. Also, any of the villainous vampires from the show can be fun to write about, as they can add a lot of drama to the fanfiction.
Obviously, Erica's sister is a main character. And we can expect characters from the original 'My Babysitter's a Vampire' series to be involved as well, like the babysitter who is often in the middle of the vampire - related chaos. There may also be other vampires and humans who interact with Erica's sister throughout the story.
One interesting aspect in 'My Babysitter's a Vampire' Bennica fanfiction could be their adventures together. Maybe they team up to fight a new supernatural threat in town. They might use their unique powers, like Benny's magic skills and Erica's vampire strength.
Caroline Forbes can also be an interesting character in fanfiction. She has her own set of strengths and insecurities. In fanfiction, she can be put in different situations that test her loyalty, her love life, and her friendships. For example, she could be in a situation where she has to choose between her vampire friends and her human family in a more extreme way than in the show.
Yuki is a very popular character to focus on. She has a complex backstory, being raised among vampires and having a special connection to both the vampire and human worlds. Her relationship with Zero and Kaname also offers a lot of material for fanfic writers to explore, such as her inner conflict between her love for both of them and her duty to maintain the peace at Cross Academy.
Rose Hathaway is a very popular choice. She's strong, independent, and has a complex personality. A fanfic could explore more of her backstory, like her early training days or her relationship with her mother.
Philip and Elizabeth Jennings are obvious choices. Their complex relationship and double lives are full of potential for fanfic exploration. You can create scenarios that further test their loyalty to each other and to their country.
Jack is a great character to focus on. He's the main character, so there's a lot of material to work with. His growth in martial arts and his relationships with the other characters are rich areas to explore. For example, you could write about his struggle to master a new move and how his friends help him.
I think focusing on the Wattersons family as a whole can be really interesting in a Gumball fanfic. You can show their family dynamics, like how Richard's laziness affects the household, or how Nicole's strictness is both a help and a hindrance. Then there are the friends like Carrie, the ghost girl. Her spooky nature and her friendship with Gumball and the others can add a unique element to the story. And Tobias, with his one - sided crush on Penny, can also bring in some elements of unrequited love and jealousy into the fanfic.