a short essay describing a person; literary profile.
a brief description or portrayal of a person's character, qualities, etc
Collins English Dictionary - Complete & Unabridged 10th Edition
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Perhaps more contributive than either the older story of romantic adventure or the character sketch, was the drama.
Composite character sketch of a category of potential agent.
Write a character sketch of an employee providing quality customer service.
Your essay may be in the form of a character sketch or portrait.