When drawing the series, Hoshino entrusts her storyboards to her editor, which was initially complicated to her due to "D.Gray-man" being her first series. She faced difficulties with the initial weekly serialization of the manga resulted in multiple changes due to how the storyboards changed across this period. Following Hoshino's change to a three-mestral serialization, she uses digital from the storyboard stage. In bringing this style, she looked after manga author Tite Kubo, famous for writing "Bleach", who uses a similar style. This allowed her to add more details to her illustrations and made the faces of her characters more unique.