€¢ Get the outfit right. €¢ In the books, she is more than often wearing cloaks. So a nice green one (to represent Slytherin) or black one would make good choices.
€¢ In the movies, she is wearing a dress that is torn and stitched at the shoulders, with a corset and plunging neck line. So buying a long sleeved, plain, black dress would do, and then buying or making a corset. €¢ Cutting the neck line might be needed.
€¢ Another outfit could be her Azkaban outfit. It's just, really, a grey and white striped shirt and pants. Nothing fancy.
€¢ A wand might also do nicely. Just using a stick found off the ground, or polishing it, would be good. €¢ Decide on the hairstyle and makeup.
In the book, she is described as having sleek, coarse hair. In some fan art, her hair is often parted in the center and straight. €¢ If your hair is already straight, but has a little wave, part it in the center and take a flat iron on the lowest heat setting to it.
€¢ For wavy/curly hair, if you blow dry your hair, ... more.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.