There are three main details to include in a screenplay to develop a character: 1. The impression they create- their appearance; costume, makeup, actor, age 2. Their attitude- their personality and temperament 3. The world they inhabit- where and how they live; setting, props The most important element of a character is their personality, which is what you should develop first. To do this you could place them in scenarios and imagine their reaction. These may be unrelated to your narrative but might help you come up with ideas, or you could place them a scenario you already want to include in your screenplay, helping you to build a scene as well as a character. Some scenarios might be: - What would the character do if they were cheated on? - What would the character do if they were mugged? - Would your character accept a bribe and why? Other questions you could ask about your character to develop personality are: - Why are they interesting? - How does their personality...