Koike Amuko, Umineko no Naku Koro ni, Stakes of Purgatory, Lucifer (Sister of Purgatory), Leviathan (Sister of Purgatory), Satan (Sister of Purgatory), Mammon (Sister of Purgatory), Beelzebub (Sister of Purgatory), Asmodeus (Sister of Purgatory), Belphegor (Sister of Purgatory), Pixiv, Fanart