Didier Viardot is a Temple Knight of the Orthodox Church of Hortensia, renowned as the strongest warrior in its Order. He dons imposing black armor with gold accents, a matching cape, and helmet, wielding both a rapier and an axe. His combat prowess exceeds even that of Fernando Ober and Leon D. Olivier, the kingdom’s famed invincible knights, placing him as their equal in skill and reputation. Viardot possesses the Magonian Relic, a pivotal artifact in the series lore. During a pivotal assault on the main cathedral, he intervened as Alfred and allies battled summoned monsters and twin assailants demanding the relic, single-handedly slaying the legendary Salamander dragon that breached the sanctuary. Operating under Pope Alexis Vall d'Hebron's command, Viardot holds high authority and trust within the knightly order. His allegiance is unwavering to the Church’s leadership, implicating him in the Ecclesiastical Knights' unsanctioned mission to burn a village.