Rosette's contractor, partner, and closest friend. Chrono is stoic, loyal, kind, and somewhat quiet. This mild facade of a young boy belies a fierce, full-grown demon of infamous power and utmost rage. His contract with Rosette allows him to exist without his set of horns, which were ripped from his head in an early battle with Aion prior to the initial storyline. Demons' horns allow them to absorb astral energy, which bestows both power and life. In order to maintain Rosette's remaining life force and prevent Chrono's subconscious from stealing the rest, her life's energy is kept sealed in a pocket watch that is worn around her neck, the creator of which is none other than the sinner Shader.Despite being a demon, Chrono cherishes life and those he loves. This creates conflict whenever Rosette is required to unseal her pocket watch, allowing him to harness his immense power to defeat powerful foes or rescue them in desperate situations. Chrono will always try to persuade Rosette to think of other solutions as releasing the pocket watch not only creates pain in his partner, but also lowers her already shortened lifespan.Whenever his powers are sealed, Chrono retains the form of a young boy who appears extremely docile and rather charming, often surprising the humans he is familiar with. Although considered a "reformed" demon, Chrono has quite the temper, and if provoked will go into a terrifying rage that blinds him from most everything around him, including the people he cares about. Despite this, Chrono is deathly afraid of hurting others, or of being unable to protect those most important to him. His shadowy past with Aion and the series' namesake Mary Magdalene is what motivates him to accept Rosette's contract despite the pain she will suffer and the end that he sees ahead. In the manga, Rosette has unsealed Chrono significantly more times than in the anime.