Billy, he's the kind of character who gets into all sorts of silly situations. And Mandy, she's the one who usually has to get him out of trouble or is just there to witness his antics. In the context of the fanfic about their kiss, they are the central focus of the story.
Well, obviously Billy and Mandy are the main characters. Billy is often the goofy and naive one, while Mandy is more cynical and in control.
Granny from the series could be a great addition. She could act as a sort of wise advisor to Mandy and Billy, providing them with valuable advice based on her own experiences. Her no - nonsense attitude could also add some humor to the story, especially when she scolds Billy for his silly mistakes or when she encourages Mandy to be more open - hearted.
The main characters are Billy and Mandy, of course. Billy is usually portrayed as a not - so - bright but kind - hearted boy, and Mandy is a rather tough - minded and often cynical girl.
A possible plot is that the kiss was part of a bet. Billy lost a bet to Grim and as a result had to kiss Mandy. But then, unexpectedly, Mandy didn't mind as much as she thought she would and it led to a series of comical and heart - warming events in their little group.
Perhaps in a fanfiction where there's an alternate universe. In this universe, Billy and Mandy are normal kids without all the spooky stuff around them. They participate in a school play where they have to kiss as part of the script, and this kiss makes them see each other in a different light, starting a romantic sub - plot in this otherwise normal world for them.
Most Billy x Mandy fanfic often has a spooky or supernatural element, just like the original show. It usually centers around the odd couple - Billy, the dim - witted but good - hearted boy, and Mandy, the cynical and somewhat menacing girl.
One common theme is friendship. Despite their differences, Billy and Mandy's friendship is always a central part of the fanfics. Another theme is adventure. They often go on various adventures together in the fan stories.
You can also start by introducing a new character who challenges their relationship. Maybe a new girl has a crush on Billy and Mandy gets jealous. In the heat of an argument to claim Billy as her friend (or more), she kisses him. This would create an interesting starting point for the fanfiction.
Naruto himself is often a popular choice. His energetic and determined personality can bring a lot of action and positive energy to the fanfiction. Billy is also quite popular as his naivete and simple - mindedness can create humorous situations when paired with Naruto's more complex ninja world. And Mandy, with her dark and controlling nature, can be an interesting contrast to Naruto's heroic ideals, making for some great character - driven stories.
One character that would be great to add is a time - traveling adventurer. This character could accidentally bring Billy and Mandy to different time periods. They could end up in the prehistoric era, where they meet dinosaurs and cavemen. Or they could be in the future, in a world full of high - tech gadgets that they don't understand. The time - traveling adventurer could then be their guide through these strange times, while also having his own motives and secrets.
Billy and Mandy themselves are obviously very popular. Fans love to write about their adventures and how they interact with each other. Grim is also a key character that often features prominently. His role as a sort of guide or mediator in their crazy world is always interesting to explore in fanfiction.