Ideally, a pen portrait should be around one side of A4 or a few well-crafted paragraphs. Write in the Third Person:
"Officer Smith has served for eight years. He is punctual and meets basic performance metrics. No disciplinary actions on file."
"An upright officer with striking military bearing, his professional commitment is beyond reproach. He has shown rare enthusiasm and an innovative approach during active operations, providing great impetus to task attainment. He leads by personal example, maintaining the highest standards for others to emulate. His human approach and coordination skills have earned him the respect of all ranks." Bartleby.com Key Elements of a Strong Pen Picture
1. : a picture drawn with a pen. 2. : a written description : sketch. Merriam-Webster Definition: Pen portrait - AQR
