Mental illness, especially dissociative identity disorder, is a significant theme in "Lain": the main character is constantly confronted with alter-egos, to the point where writer Chiaki Konaka and Lain's voice actress Kaori Shimizu had to agree on subdividing the character's dialogues between three different orthographs. The three names designate distinct "versions" of Lain: the real-world, "childish" Lain has a shy attitude and bear pajamas. The "advanced" Lain, her Wired personality, is bold and questioning. Finally, the "evil" Lain is sly and devious, and does everything she can to harm Lain or the ones close to her. As a writing convention, the authors spelled their respective names in kanji, katakana, and roman characters (see picture).