Another possibility is a tomboyish girl. She already has some boy - like qualities and behaviors, and in the novel, she gets to fully experience what it means to be a boy, which could lead to some interesting adventures and self - realizations.
It could be a young girl who often wonders about what it's like to be a boy. This character might be someone who is curious about the opposite gender's life.
The Hive Five could also be the main villains. They might be jealous of Beast Boy's growth and potential. They could team up and try to take him down. Each member of the Hive Five has their own unique abilities that could pose a challenge to Beast Boy. For example, Jinx could use her bad luck powers to disrupt Beast Boy's transformations, while Gizmo could create technological traps to catch him.
The main character, the boy, could be someone with a very unique personality. Maybe he's a bit of a rebel and doesn't really care about the fact that he's in an all - girls school. He could be confident and use this opportunity to make a name for himself. Or he could be a shy boy who is really intimidated at first by all the girls around him.
Maybe an outcast noble. They've been shunned by their family for their interest in the dark arts. So, they embrace necromancy fully and aim to use it to take revenge on those who wronged them. They start by raising the dead of their family's enemies, and gradually build an army of the undead. Their journey would be filled with self - discovery and moral quandaries as they delve deeper into the world of necromancy.
It could be an old veteran ninja who, after years of service, decided to open a shop. He has a gruff exterior but a heart of gold. He uses his war stories to attract customers, especially the young ninja trainees who are eager to hear tales from the front lines while they browse his selection of kunai and shuriken.
Daenerys Targaryen could also be a main character in an emperor - like role. She already had a strong claim to the Iron Throne and was a powerful leader. In a fanfiction, she could fully embrace her role as an all - powerful emperor, perhaps even uniting the Seven Kingdoms under her rule in a more forceful way than in the original series.
The main character is, of course, the funny boy. But without reading the novel in detail, we don't know much more about him yet.
I'm not familiar with the 'the house boy novel' in detail, but as the name suggests, the main character is probably the house boy. However, there might be other characters who play significant roles, like the people in the house he works for, or his friends or family if they are part of the story in some way.
The main character is the boy named Dave Pelzer.
The giant boy himself could be the main character, of course. He's the one with the unique situation of 'voring' things.
Maybe the main character is a boy named Jack who is very interested in magic. He has been reading about magical transformations and one day, while trying to perform a simple magic trick related to flowers, something goes wrong and he turns into a flower girl. This forces him to face a series of challenges in his new form and learn more about himself.