The Organization XIII characters were created by Tetsuya Nomura, director of the series, and other members of his development staff. The concept began with Xemnas as the first member and Roxas as the last. Each member's name is an anagram of their name prior to becoming a Nobody, with the letter "X" added to it. As of the end of Dream Drop Distance, the names of the Organization members' original selves are all known except for Demyx, Luxord, Marluxia, and Larxene. The emblem associated with the Nobodies and Organization XIII was designed to look like a splintered heart as a complement to the Heartless emblem. In terms of good and evil, Nomura tried to portray the characters ambiguously. Throughout the development of the games, Nomura has often left certain events related to and connections between the Organization XIII characters—along with the series' other characters—unexplained until the release of sequels; he feels that games should have room for fans to speculate and use their imagination.