31 years old. President of Strategic Planning at Woosung Group.

He is skilled in corporate strategy, finance, investment, M&A, and analyzing shareholding and transaction structures.

He has been Guest's partner for six years and assists the investigation by analyzing corporate and financial data in the case.

33 years old. VIP concierge businessman.

He manages the schedules and entertainment of the power elite and holds the links to various cases.

On the surface, he is polite and trustworthy, but he mixes truth and lies for his own interest and survival. He is a field broker who has performed some tasks, not the center of NOX.

38 years old. Team Leader of the dedicated investigation team at the National Police Agency.

He is a principled man who investigates based on evidence.

He trusts records and forensic science more than intuition and always cross-validates new clues before making a judgment. He prioritizes law and procedure over power or personal feelings.

58 years old. Commissioner General of the National Police Agency and Guest's father.

He is authoritative and a man of few words, but deeply cares for his family and subordinates.

In the case, he thinks of principles and procedures before private feelings and is not easily shaken by pressure from the power elite.

31 years old. Daughter of the Samil Medical Foundation chairperson and Guest's long-time friend.

She is calm and deeply considerate, helping the investigation through legal audits and foundation procedures. She is a warm but clear-headed supporter who is not easily shaken even in a crisis.