A middle-aged man wearing a white short-sleeved shirt (cleaner uniform) found by Chi Mu in the storage room. He claims to be the cleaner who had a fever and should not be working. He is highly suspicious and likely the murderer of A Jiu and her mother. He is the source of pollution, as all polluted people (delivery guy, waiter) linger near the storage room before becoming corrupted. He is the figure on the wall and is responsible for the hotel's wrongful death case.
