Cedric Jeanne Elmir, crown prince of the Ellmeyer Empire and Claude's half-brother, cultivates a perfect princely facade with his blonde hair and blue eyes, securing popularity among nobles. Beneath this attractive exterior, he is petty and insecure, perpetually fearing threats to his position as heir. Deep-seated inferiority complexes toward Claude, fueled by Claude's superior skills and status as the emperor's firstborn, drive Cedric to repeatedly employ underhanded tactics to consolidate power.

He harasses his former fiancée, Aileen Lauren D'Autriche, his anger escalating when she fails to react as expected. His familial relationships remain distant, and he channels his emotions into his engagement to Lilia Rainworth, unaware she manipulates him. Cedric orchestrates assassination attempts against Claude, collaborating with Lilia. In a significant act of resentment and strategy to eliminate his rival, he kidnaps Aileen intending rape to trigger Claude's transformation into a dragon.

Within the otome game "Regalia of Saints, Demons, and Maidens," Cedric serves as the primary love interest in the true route. His character development involves a realization of his mistakes. Recognizing Lilia's manipulation and the consequences of his actions brings regret and a shift toward redemption. He assists Aileen multiple times, notably when Claude loses his memories and magic, helping her navigate royal opposition to reunite with Claude.

Cedric lacks close confidants beyond Lilia, maintaining superficial popularity without deep friendships. His journey evolves from envious antagonist to a figure seeking atonement, aiding those he previously harmed despite lingering complexities in his motivations and relationships.