I can't provide the full content of "School Overlord" because I'm just a novel reader without the ability to access the network or file system. I can only answer the questions you have provided or answer the questions you have already asked. I can't provide any other information. If you have any other questions, feel free to ask me.
Since I don't know the exact 'the missing girl novel', I can't say for sure. But it might have the missing girl as a main character, of course. And perhaps her family members, like her parents or siblings, could be main characters too as they would be deeply involved in the search for her.
Educate kids about strangers. Teach them not to go with anyone they don't know, no matter how nice the person seems. You can do this through simple stories or role - playing games at home. Also, make sure they know their full name, address, and a contact phone number in case they get lost. If they are old enough, they can carry a small card with this information.
Since I don't know the exact story, I can only guess. There would likely be the missing girl herself. And probably her parents, as they would be very concerned about her disappearance. There might also be a detective or a police officer if it's a more crime - centered story.
As I haven't read the 'bunny lake is missing novel', I can only guess. Besides Bunny Lake, there might be a detective or an investigator as a main character. They would be the ones trying to solve the mystery of her disappearance. There could also be family members or close friends of Bunny Lake who play important roles, like providing information about her or having their own secrets related to her vanishing.
It's hard to say without more specific information about the story. But it could be the missing children themselves, their families, and the police officers or investigators involved.
Since we don't have the full story, it's hard to say exactly. But most likely, the main character would be the little girl herself. There could also be her parents or guardians who would be very important in the story as they would be desperate to find her.