Dark Blue Cloth is associated with certain Crane scouts and was previously found at a crime scene. It is noted for its connection to covert activities, particularly in stealth or espionage. During an investigation, Kakita Kazumi referenced this cloth while addressing guests about recent nocturnal intrusions and a poisoning incident. The mention of the cloth was in the context of discussing evidence related to the Crane couple, Doji Masato and Doji Miho, who were under scrutiny for their potential involvement in the ongoing mystery.