Phantom Thief I is a character in the anime film Eiga Oshiri Tantei: Star and Moon. Phantom Thief I is a member of the Phantom Thief Academy, an international criminal organization led by Phantom Thief G and based on Stardust Island, where the group carries out its secret conspiracy known as the Dark Age Plan. The character is identified as an inventor of gadgets, making Phantom Thief I the Academy's specialist in mechanical devices and equipment. As part of the Academy's roster of letter-coded phantom thieves, the character takes part in the events surrounding the fight over the Moonlight Stone, serving the organization alongside its other members when the Academy comes into conflict with the detective and the allied thief.