There are a few things you need in order to become a freelance fashion illustrator. First, you should have some experience drawing and designing graphics. Second, you should be able to create high-quality illustrations that will capture the attention of your clients. Third, you should be able to work independently and be able to take on new projects without any help from your team. Finally, you should have a good eye for detail and be able to capture the most important aspects of a design in your illustrations.