They are the living judges of the human world selected by the underworld. They have their feet in the two realms of yin and yang, can see people's hearts with their naked eyes, and hold the power of life and death.
The four unfaithfulness - disloyalty, unfilial piety, disloyalty, disbelief; the four no's - rudeness, unrighteousness, lack of integrity, shamelessness, light punishment for minor crimes, and heavy punishment for serious crimes.
They hold the book of life and death in their left hand and the soul-enchanting pen in their right hand. They specialize in the task of extending the life of the good and letting the evil go to hell.
Luo Han, as his name suggests, no matter whether he is a human or a ghost, when he sees him, he will feel the cold and suffocation brought by hell.
Yan Xiaowu has an unstable personality, and anyone who provokes her will not end well. Unless you want to visit the underworld earlier.