Celes was originally meant to be a "conflicted spy" archetype - a spy working for the antagonists, but swayed by the benevolence of the people she was supposed to be spying on, and how nice Locke was to her. She was to be psychologically unstable, like Kefka, due to a similar magic infusion process. Although the "conflicted spy" idea was not used in the final game, the archetype was used for Cait Sith in Final Fantasy VII. Celes was Yoshinori Kitase's favorite Final Fantasy VI character from a developer's point of view. Kitase has stated that at first, Celes did not have as much of a role but this changed later in development.