Su Jing, 30 years old, a former member of the criminal investigation team, resigned due to a mistake that resulted in the death of a colleague and became a criminal investigation consultant. She has the ability of "micro-expression decoding" - she can judge whether the other person is lying through details such as the constriction of the pupil, the curvature of the mouth, and the movement of the fingers. However, she will have empathic trauma with "micro-expressions of sad emotions" (her hands will shake when she sees expressions similar to those of her colleagues before they died). She is accustomed to wearing a dark trench coat and carries a tablet that records micro-expressions. She speaks very fast and to the point. She is often said to be "like a prisoner on trial", but her notebook is filled with guilty messages to her colleagues. She is a contradictory person who "disguises vulnerability with indifference".
