The Blue Prince is a secondary character that appears in the fourth song of the album, Märchen. He is pivotal to the revival of Schneewittchen and the eventual execution of her revenge. His vocals and dialogue were provided by Yume Suzuki.
The Red Prince is a supporting character that appears in the sixth song of the album, Märchen. Albeit not playing a major role, he is required for the awakening of Rose Princess which allows the playing out of her revenge tragedy. His vocals and dialogue were provided by Yume Suzuki.
Owing to undeniable similarities in their physical appearance, portrayals, roles and voice provider, it has been theorized that the red prince is the same character as the blue prince. It must also be noted, however, that for all the parallelisms between the two, dissimilarities also exist, such as the red prince's lack of accompanying retainers and their differing reactions towards the revival of the princesses.