So you have worked out a plot. You know how your story starts and where you would like it to end but before you can begin writing it pays to think about your characters. I have some rules that will help you write great characters and also help you write great stories
1) Don’t have too many. Lots of characters are not only confusing to write about, they are confusing to keep track of when you read
2) Its often less important how they look (blue eyes and blond hair is unlikely to have any affect on how they solve their problem and achieve their goals in your story) and more important how they behave. Are they polite and respectful, angry, sad, or rebellious? Are they good at art, maths, good with friends, awkward, or shy??? Do they watch a lot of tv, or read a lot of books? Are they sporty and adventurous? Do they pick their nose, obey their parents, lie, or avoid their homework?
3) Little details can tell you a lot about a person. Do they wear nail polish to school when the school rules forbid it? Do they wear odd socks because home life is disorganised or they think it looks cool? Is that scar from an accident or where they were marked by their enemy? Do they sniff a lot (allergies, bad cold, bad habit?)?
4) The better you know what kind of person your main character is the easier it is to figure out how they are going to deal with the problems you throw at them in your story. Are they the kind of person to solve their problems alone or will they get friends to help? Do they have special skills or talents or are they brave and determined?
5) In the best stories the main character will change or learn something as they solve their problem. Maybe they are a loner who needs to work with others to fight the bad guy. Or perhaps they have to overcome their shyness or their fear. if you have an idea what that change is it will make it easier to write the story.
6) The right name can make a big difference. Calling your character Myrtle or Arthur will have a different affect on your reader, compared with calling them Hannah or Josh. Voldemort would never skip, sing nursery rhymes or smell flowers but then Suzy is unlikely to use the killing curse.
7) Don’t be afraid to have your character behave or react as you would behave or react. It helps make them more real to your reader. My characters often have bits of me in them but because I mix in some qualities I would like to have and then add a few other qualities no one can tell which part is which.
8) No one is perfect. Your character shouldn’t be perfect either. The best characters have good qualities as well as bad qualities.
Good luck with your characters. The better you know them the easier they will be to write about and the more fun they will be to read about.