Well, in addition to Applejack and Apple Bloom, if the fanfic delves into their family history, there might be other relatives who are related to their mother. These could be secondary characters that help to flesh out the story of their mother and how she was part of the family. But at the core, it's really about Applejack and Apple Bloom and the shadow of their mother in their lives.
One possible interesting storyline could be about the family bond between Applejack and Apple Bloom, and how their mother's influence (even if not directly present) shapes their characters. For example, they might inherit certain values from their mother which are shown through their daily activities on the farm.
Maybe some of the older ponies in her family, like Applejack, could be main characters. Applejack could be guiding her, teaching her things about the family business or just sharing life lessons. And through these interactions, Apple Bloom gets closer to finding out what her cutie mark represents.
There could also be antagonists in the fanfic. For example, the Trix, a group of witches who are always causing trouble for Bloom and her friends. They could be the main source of conflict in the story, constantly trying to thwart Bloom Sky's plans and steal their powers.
Based on the title, it seems that Bloom and Sky are the main characters. They are likely the ones involved in the kiss and around whom the fanfic's story revolves.
I'm not sure specifically as it depends on the fanfic. But it could be the mascot of Cinnamon Apple Jacks as a main character. Maybe there are also kids who are huge fans of the cereal and they could be the main characters, like a group of friends who always share their Cinnamon Apple Jacks experiences.
I'm not sure specifically as there are many possible characters in the My Little Pony universe that could be involved. It could be Applejack, since there's the word 'apple' in it and she is an important pony related to apples. Or it could be a new, made - up character who is the 'bad apple' among the regular ponies.
There's no way to tell exactly who the main characters are without reading the 'bloom graphic novel'. However, it might have a protagonist who is an artist trying to find inspiration, and the process of blooming could symbolize their creative growth. There could also be a character who is a bit of an outcast at the start but then blooms into a confident person as the story progresses. And perhaps there are some side characters like a talking animal or a magical being that helps the main character on their journey.
I don't know for sure as I haven't read the novel. But it could be a gardener who takes care of the dahlias and is the central character. Maybe there's also a neighbor or a visitor who is drawn to the dahlias and becomes part of the story.
I don't know for sure, but it could be the mother herself, her children, and perhaps some of the well - known Naruto characters like Naruto, Sasuke, or Sakura who might be involved in the story related to the mother's sins.
It could be an old farmer who grows the apples that are used in the Christmas celebration in the story. He might have a special connection to the apples and the Christmas spirit. Also, there could be a group of children who are excited about the Christmas apples and they play a major role in the story.