Sui Takishima (滝島 翠)
Sui is Kei's younger brother and resembles a younger version of Kei. Initially, he dislikes Kei because he finds living with him disgusting and thinks of him as a robot wearing human skin. Because Sui feels very inferior to his brother, who is good at everything, he believes that he cannot reach Kei's level and he refuses to take his studies seriously. However, when he sees that even his "perfect" brother can become desperate and caring, Sui develops a huge brother complex. Sui likes to call Hikari "Stupid Girl", but approaches her frequently when he thinks that Kei needs help. He is in grade 6, class B at Hakusenkan's elementary school division.
Voice Actors
Kaori Shimizu
Japanese
Clint Bickham
English
Tae Yeol Jeon
Korean
Sandra Vandroux
French
Annalisa Longo
Italian
Jared Mendoza Coba
Spanish