Akio Watanabe
The characters of the Japanese visual novel "Popotan" were designed by Akio Watanabe under the alias Poyoyon♡Rock, and the characters in the anime adaptation were designed by Rondo Mizukami and based on Akio Watanabe's original concepts for the visual novel. The series takes place on a fictional Earth in which exist supernatural beings with powers and follows three such supernatural sisters as they travel through time in a mansion, searching for the reason for their journey. Though many of the characters in the visual novel share personality traits and character relations with their anime counterparts, there are numerous differences between the two media. Both the visual novel and anime have mutually exclusive characters in addition to the changes in character roles.