Several of the characters from the series were inspired by characters and concepts from other video game franchises:

• Saori from Hyperdevotion Noire: Goddess Black Heart shares her design inspiration with the recurring enemy Tokemei Sister, as they are both based on the character Shiori Fujisaki from the dating sim Tokimeki Memorial.
• While not exactly similar, Hatsumi Sega from Superdimension Neptune VS Sega Hard Girls shares part of her design inspiration, Hatsune Miku and the Project Diva series, with the character Tsunemi from Hyperdevotion Noire: Goddess Black Heart.
• B-Sha from Megadimension Neptunia VII shares part of her design inspiration with Lady Wac from Hyperdevotion Noire: Goddess Black Heart, who is based on Pac-Man. She also shares some character traits with Generia G from Hyperdevotion Noire: Goddess Black Heart, whose design is based on the game SD Gundam G Generation.
• S-Sha shares part of her character inspiration with Ein Al from Hyperdevotion Noire: Goddess Black Heart, whose design is based on the Final Fantasy series.
• Estelle's design is based on the Dragon Quest series has an attack that references the classic Dragon Quest battle interface.
• The characters K-Sha and Lid have several references to the Metal Gear franchise.
• K-Sha has an attack inspired by the same game series as Moru, Monster Hunter, and shares design inspirations with Vio and Lee-Fi, who were based off Resident Evil and Street Fighter's Chun-Li, respectively.