Who could be the main characters in a school for robots story?

Definitely Twilight Sparkle could be a main character. She is intelligent and her magic skills would be useful when dealing with the unknown world of robots. Also, a friendly robot like B - 12 (from a different robot - related story) could be a main character. They could form an unlikely duo to explore their combined world.

Obviously, the three robots are the main characters.

The main character is Harry, and then there are the robots. We don't know exactly how many robots or what kind of robots they are yet, but they play a significant role in the story as they are in the title along with Harry.

Well, it could be about the robots learning human emotions. For example, one robot discovers sadness when it fails an important test at the school.

Definitely the students. There could be a girl who has been dancing all her life and dreams of becoming a professional ballerina. Another main character could be a boy who is new to dance but has a natural rhythm. And don't forget the school director, who is always trying to balance the budget and keep the school running smoothly while also dealing with the drama among the students and teachers.

The school librarian could be a main character in a femdom school story. She controls the access to books, which is a powerful position. She might have strict rules about borrowing and returning books, and if students break those rules, she has her own ways of dealing with them, like making them help with library chores for a week.

One main character could be a young superhero who has just discovered his powers and is trying to fit in at the school. Another could be an older student who has been at the school for a while and is a bit of a rebel. And there could be a character who doesn't seem to have any powers at first but later discovers a hidden power within. These characters would interact, learn from each other, and face various challenges in the 'School for Superheroes Story'.

A young boy with the power of super speed. He's always eager to prove himself and is often the first to volunteer for dangerous missions.

There could be the scientists who create the killer robots. They might be the main characters as they are the ones starting this whole situation.

Since I'm not familiar with the book, it's hard to say who the main characters are. But they could be humans who are involved in the robotics industry, like engineers or scientists. Or perhaps there are some special robots that are the focus, such as a robot detective or a powerful combat robot.