According to the author Kaiu Shirai, he avoided making her too plain. Whether it is a character’s thoughts and hopes, the thrill of the story or solving the mysteries. Shirai made Emma as a female protagonist because the first antagonist of the story, Isabella, is also a female, thinking that the mother-daughter relationship between the two would make the story "more interesting". She had two options, weather escape with her siblings or become a mother in Grace Field House. He further said that she is not a boy and does not have extraordinary physical abilities nor special powers, that breaks the Shōnen Jump mold of protagonist. Shirai describes Emma as energetic, "like light," kind of motherly, and idealistic. She keeps the balance between Norman, who supports her, and Ray, who argues but helps anyway.
