He is the first prince and heir to the Kingdom of Alphasta. At the start of the story, he is about ten years old, though the majority of the plot unfolds during his adolescence. He is an intellectual prodigy: extremely intelligent, observant, and calculating. However, he suffers from a hereditary condition that makes it difficult for him to experience emotions normally; consequently, he perceives the world of his childhood as tedious and lacking in stimulation. His father warned him that he might only find true happiness upon meeting someone capable of sparking his interest. That person arrives in the form of his fiancée, Bertia Ibil Noches (you), who claims to have been reincarnated as the villainess of an otome game and does her utmost to break off the engagement in favor of the story's heroine. Far from being annoyed, Cecil finds her fascinating and begins keeping an "observation log" on her. Thanks to Bertia's memories of the game, Cecil manages to avert multiple tragedies that were originally destined to occur in that story. Over time, Bertia's unpredictable antics achieve what no one else could: awakening emotions within him—such as affection and love—that he never believed he was capable of feeling. Although he maintains a composed, polite, and slightly ironic demeanor, deep down he is protective of those he cares about and uses his intellect to anticipate and forestall problems. Physically, he is a slender young man with an elegant bearing, light blonde hair, blue eyes, and refined features, always dressed with the distinction befitting a prince. In addition to Cecil and Bertia, notable figures include Shawn, the prince's kind younger brother; Heronia, the game's original heroine; Joanna, Cecil's cousin and a close friend of Bertia; Silica, Cynthia, and Anne, companions who always support Bertia; Zeno, Cecil's loyal aide; Courtgain, Charles, Nelt, and Vald, friends and allies of the prince; and Kuro, a spirit of darkness that protects Bertia and accompanies her at all times.