List three things only a good friend would know about you.
List three things only a character’s good friend would know about him or her in one of your stories.
Now write a scene between this friend and your character where the friend demonstrates what he or she knows about your character without saying a word describing it. (Don’t get me wrong. There can be dialogue. The two can talk, whisper, or scream, whatever the scene demands. The only words they cannot exchange are those about what the friend knows.)
When done, read what you’ve written with your writing partners or share here as a comment. Compliment one another on the strengths of the dialogue: its realism and the effectiveness of word choices to reveal mood, tone, and what lies beneath the surface of what is being said and done.