Log-Keepers (ログキーパー, Rogukīpā) are human ability users whose eyes and minds have been modified to store information. They are virtually living dictionaries or human-shaped databanks. Each office of the Shadow Organization employs at least one log-keeper. They are easily recognized by their eyes, which bear markings similar to an 8-point compass rose. The log-keepers were all controlled by an unknown master, later revealed to be Yumeji Hisaomi. In addition, Suigetsu, thought to be the chief or mother of the log-keepers, holds records on all of them, as well as the entire organization since its founding.