Yana Toboso is a manga artist and representative of the creative studio D-6th. She created the original concept for the mobile game Disney Twisted-Wonderland and is the main scenario writer and character designer. Toboso is also well-known for creating the popular manga series Black Butler . Sumire Kowono is the artist for two series set in the Disney Twisted-Wonderland universe, Book of Heartslabyul and Book of Octavinelle . Wakana Hazuki is the storyboard artist for Book of Heartslabyul and Book of Octavinelle , which both take place in the Disney Twisted-Wonderland universe. A short comic Shitsuji Baby (Butler Baby) was also published in Nijishitsuji (Rainbow Butler), a Black Butler manga anthology released in Japan.