 Sophocles then wrote plays that included a third actor.A description of the protagonist's origin cited that during the early period of Greek drama, the protagonist served as the author, the director, and the actor and that these roles were only separated and allocated to different individuals later.There is also a claim that the poet did not assign or create the protagonist as well as other terms for actors such as "deuteragonist" and "tritagonist" primarily because he only gave actors their appropriate part.