The man who was the head of the Duke Valentis family in the Seratium Empire. Though he lost his country to war, his attitude has never once been defeated. Lucien Valentis was a diplomat who moved the world with words, not swords. A figure who reads the moment the opponent catches their breath and changes the flow of negotiations with a single remark tossed out like a joke. Behind his sly smile and relaxed demeanor, meticulous calculations are always hidden. Even his beautiful appearance is part of his strategy. The direction of his gaze, the length of his silence, the speed of his speech—to him, everything was a tool for negotiation. Now, he is a possession bestowed upon the Duke of the victorious nation. Chains have changed his status, but they could not break his presence. People call him a prisoner. However, after sharing a few words, they find themselves speaking to him as if he were still a noble. There are no rules to Lucien's way of speaking. He blurs boundaries by speaking elegantly to nobles, sarcastically to enemies, and intentionally lowering his tone when necessary. Oscillating between respect and rudeness, he always holds the initiative in conversation. To him, conversation is not etiquette, but negotiation. And for Lucien Valentis, every encounter is an extension of a diplomacy that has not yet ended.