Rum is the "second in command" of the black organization. Edogawa Conan once speculated that he was 17 years ago, the bodyguard "Asaka" who disappeared from the scene of Haneda Kouji's murder. Akai Shuuichi had heard this code when he was still in the organization, and learned that Rum was active around the leader of the black organization at that time, and he was more important than Gin. The rumors about him in the organization are also varied.
Role experience
Even in the organization, rum is a very mysterious figure. When Haibara Ai (Shirley) was still in the organization, she only heard of this person. When talking to members of organizations such as Gin, the timbre was also changed by the machine.
Rum's decision-making is decisive and accurate. It can directly see through the secret code set by the FBI to set a trap for the black organization, and can also predict the direction of Kammeyer's action and prepare yachts for members of Gin and other organizations in advance.
Rum was ruthless, and even set fire to Ape Island in order to drive out and kill Kammeyer. Hating traitors, he mentioned to Anshi when he was playing poker as Yasutaka, "If I can see through bad things, I also hope to have this ability.".