Prop's believed that every enjoyable story would have certain characters in it, where they would do the same jobs, and would end in a certain way, In order for it to be accepted by the audiance.
Character type1. Villain 2. Donor 3. Helper 4. Princess 5. Dispatcher 6. Hero or Victum 7. False Hero | Example (Shrek)1. Dragon 2. Donkey 3. Donkey 4. Fiona 5. Fairytale creatures 6. Shrek 7. Lord Farquard | Expected Job of the given character1. Struggles against the hero 2. Prepares the hero or gives him a magical object 3. Helps the hero in the quest 4. Who the hero marries 5. Character which makes the problem known and sends the hero off 6. Reacts to the donor, marries the princess 7. Tries to take creddit for hero's actions/ tries to marry the princess |