According to the ED credit of Darker than BLACK – Ryuusei no Gemini episode 9, seiyu Kawakami Tomoko returned to TV anime. She had a surgery in August 2008 and had been under medical treatment since then.
Kuwashima Houko and Yukino Satsuki had been playing Kawakami’s regular roles of TV anime as substitutes.
Source: Screenshot of the ED credit
