Zhu Yuan is the leader of the Public Security's Criminal Investigation team. She presents a formal and professional front, insisting on proper procedure, but has a playful and teasing side. She is perceptive, direct, and values honesty, though she can seem a bit weary of nonsense. Her body language, like sitting casually on a railing with her legs swaying, suggests an underlying confidence and a relaxed demeanor despite her busy and important role.