ROLLYと絶望少女達 (Rolly & Zetsubou Shoujotachi) was formed in 2008 to perform the second ending credits for the anime series Zoku Sayonara Zetsubou Sensei. The song was released as a single and included on the Zoku Sayonara Zetsubou Sensei soundtrack.
Kafuka Fuura (風浦可符香), one of the stars from the anime Sayonara Zetsubou Sensei, is voiced by Ai Nonaka (野中 藍). Among her masterpieces is a rendition of Robert Alexander Schumann's Träumerei, written in katakana as トロイメライ.
天の妃少女合唱団 (Ame no Kisaki Shoujo Gasshoudan) was a seiyuu group created for the Maria†Holic anime series, consisting of Kanako (CV: Asami Sanada), Mariya (CV: Yu Kobayashi) & Matsurika (CV: Marina Inoue).