Final answer:
In the Psalms of lament, King David is not a main character.
Step-by-step explanation:
In the Psalms of lament, the main characters are the ones who are expressing their deep sorrow, grief, or anger to God. These psalms often include pleas for help, expressions of trust in God, and in some cases, imprecations against enemies. Therefore, based on this information, it can be concluded that King David, who is traditionally considered the author of the Psalms, is indeed a main character in the psalms of lament. So the correct answer is that King David is not a main character in the Psalms of lament.