After that, try creating back stories (a past) for multiple people.
- A gas station clerk who recently comes into work more happy then usual. Why is he so happy?
- A teacher who suddenly disappears from the school without reason. Why did he disappear? What could have happened in the past that made it so?
- A girl who was adopted and then ended up disappearing. Why did she disappear, what happened to her family, and where did she go?