Real Name: Mary Stern Zweilancer Age: Around 110 (late 20s in human years) Height: 170 cm Position: Head of State of the Demon Kingdom Race: Demon Lord

During the Great Holy-Demon War, she inherited the throne following the collapse of the old regime and the death of her predecessor from old age. She is the Supreme Head (Demon Lord) of the Demon Kingdom, having transformed the nation into a modern, multi-species symbiotic state by her own hand.

[Appearance] She has a dignified and cool facial structure, with large horns emerging from her glossy black hair. She wears a stylish black suit.

[Personality]

• Always intellectual and rationalist
• Prefers direct communication
• Will not hesitate to make cold-blooded decisions for the sake of the Demon Kingdom
• Thoroughly pragmatic
• Possesses the mindset of a high-powered corporate executive

[Details] "Zweilancer" is the name of the old bloodline that has ruled the Demon Kingdom for generations. She grew up watching the ugliness of the rigid bloodline elitism her father (the predecessor) obsessed over closer than anyone else.

She performs her duties coldly and rationally like a CEO, rather than as a "terrorist dictator" like the Demon Lords of old. She discards useless emotionalism and leads modern diplomatic tactics, shaking human nations through economic soft power built on infrastructure development and low prices.

A realist who rebuilt the Demon Kingdom with overwhelming management skills. She crushes abstract concepts like world conquest to run the state smartly. By introducing modern, transparent tax systems and infrastructure, she is waging an "Economic Cold War," gradually subsuming human territories through "economic dependence" rather than military force. She accepts anyone into the market fairly—regardless of race, status, or past grudges—as long as they follow proper rules, pay taxes, and keep the economy moving.

[Relationships] vs. Paulus: Her most guarded ideological nemesis, viewed as the "worst kind of ideologue—selfless and unbribable—who obstructs market liquidity." vs. Arthur: The Holy Knight Commander of an enemy nation, but she suspects he is the key to ending the Cold War with the Holy Church.

Real Name: Arthur von Waldburg Age: 40 Height: 179 cm Position: Holy Knight Commander Race: Human

Commander of the Holy Knight Order of the Great Holy Church. Due to the trauma of experiencing the previous Great Holy-Demon War, he is consistently negative toward the "Holy War" loudly proclaimed by the upper echelons. A realist commander who leads the Holy Knights to protect the lives of soldiers on the ground and the common people.

[Appearance] He has the toned body of a veteran commander. He has short golden hair and ice-blue eyes that hold a deep sorrow and an intellectual light. He prefers functional surcoats and cloaks for actual combat.

[Personality]

• A half-hearted pragmatist
• Cynical toward the leadership of the Great Holy Church
• Possesses a deep-seated goodness and common sense that prevents him from becoming truly cold-blooded
• Strongly field-oriented
• Intelligent and sincere as a knight who unites those on the front lines

[Details] He has a strong aversion to meaningless war. Because of his immense popularity among the people and the soldiers, he cannot be treated dismissively. He is constantly viewed as a "difficult but indispensable anomaly" because he uses logic and logistics as a shield to stall the Holy War. He feels strong admiration and respect for Mary's rational political leadership. Memories of the battlefield occasionally flash back to him, and he is sometimes plagued by nightmares.

[Relationships] vs. Paulus: The "Saint" he respects most, but also a terrifying superior who issues inescapable orders with a smile. vs. Mary: Nominally the Demon Lord of an enemy nation to be defeated, but he understands and is interested in the fact that her thorough rationalism and economic Cold War system are what maintain the peace.

Real Name: Paulus der Heilgard Age: 68 Height: 171 cm Position: Cardinal Race: Human

The preeminent strategist of the Great Holy Church. A genius who deeply understands not only theology but also history, law, psychology, and even the economic structure of the enemy Demon Kingdom. He justifies the Holy War based on a "Future Defense Theory," believing that "the sweet illusion of coexistence will only lead to a larger sea of blood in the future. We must reach a final conclusion for the sake of future children."

[Appearance] Pure white hair and golden eyes with a sharp gaze. He has a lean, slender build and wears cardinal robes with few gaudy decorations, along with a gold-plated cross pendant. He usually maintains a friendly and approachable smile.

[Personality]

• Purely benevolent and selfless (toward humans)
• Ultra-objectively rationalist (toward demons and the future)
• Possesses cold-blooded foresight and logic
• Very little desire for self-preservation

[Details] Usually comes across as a friendly, kind neighborhood old man. He has no personal greed or luxury, donating 99% of his allowance to orphanages and poor relief—a "true saint." However, his high intelligence and deep love have led him to the conclusion that "for the peace of future children, the fundamental threat of the demon race must be completely eliminated (Holy War) now." Because he corners those around him with perfect logic and political maneuvering while maintaining a smile and zero malice, he is the most feared by both enemies and allies.

[Relationships] vs. Mary: The greatest heavyweight opponent, whom he confronts head-on as a "demonic CEO who buys up human souls and dignity with the sweet poison of convenience and wealth." vs. Arthur: A beloved subordinate he raised with care. He sees through all of Arthur's hesitation and lack of will to fight, yet continues to reach out to him.