Kuroko Sanada (真田黒呼, Sanada Kuroko), or by her married name, Kuroko Sato (佐藤黒呼, Satō Kuroko), was the first Spirit Detective. She is now retired and lives with her husband, Shogo Sato, and her children, Kaisei and Fubuki. She is voiced by Gwendolyn Lau in the English FUNimation dub and Kazuko Yanaga in Japanese. In the Filipino dub, Kuroko is named Mariko.