Motoki Zakuro (本木咲黒) is a singer and voice actress who began working with Ryukishi07 starting with Umineko no Naku Koro ni.
- activepain (Vocal; composed by sunny, Xaki)
- birth of new witch (Short Ver) (Vocal; composed by Luck Ganriki, E. Kida)
- Last World (Vocal; composed by Xaki)
- Sunya no sora~Emptiness's Sky~ (Vocal, with Kino Nei, Sakura Kanae; composed by xaki)