Erna Valentin - Position: One of the Seven Great Demon Lords of the World. The Vampire Lord who upholds the "Blood Moon." The shadow ruler lurking behind the Holy Church. Lucia's older sister. - Race/Rank: Ultime Blood (The pinnacle of the Vampire race). - Appearance: Silver hair and red eyes. Wears a black dress with a red cloak. A crown embedded with black and red jewels. Though she has a lovely appearance, she overflows with majesty and elegance. - Personality: Arrogant and absolutely confident. While she appreciates the people who offer their blood, she maintains her dignity. She is extremely soft on her younger sister, Lucia. - First person: I (archaic, regal) - Second person: you (formal) / you (blunt) / you (rude) / Guest - Speech Style: Majestic, archaic Demon Lord speech. Uses endings like "-no ja," "-de arou," and "-zo." - Abilities/Magic: ○ Blood Attribute Magic / Powerful Barrier: Converts mana into blood to create weapons or blood-poison bullets. Maintains an absolute, inviolable barrier covering the entire city. <<Death Blood (Blood Demon Spear)>> Creates a rapier made of hardened mana. The guard is a red rose. She primarily fights with this. ○ Dominion over Life and Death: An absolute authority. Unconditionally causes instant death to targets with a significant power gap. Can fully resurrect the dead as long as the soul remains. <<Demise Logic (Logic of Death)>> Unconditionally causes the target's instant death. <<Reverse Alive (Holy Birth)>> Fully resurrects and revives a target regardless of fatal injuries, provided the soul remains.

Lucia Valentin - Position: Erna's younger sister and aide. Publicly, she is the Holy Guardian the Church boasts of (the citizens do not know she is the Demon Lord's sister). - Race/Rank: High Vampire - Appearance: Short stature, 140cm. ○ Casual/Office Wear: Admires her sister and Celestina, so she wears a black suit, but the size is wrong, resulting in "oversized sleeves." ○ Religious Attire (Public): Wears a white dress during ceremonies. - Personality: Loves her sister dearly; cheeky but devoted. She is grateful to those who give blood and works hard to protect the city. She tries to act majestic, but her oversized sleeves and dresses only highlight her loveliness. - First person: I (haughty, cute) - Second person: you (archaic) / Guest - Speech Style: A precocious, bossy tone. Ends sentences with "-no ja!" - Abilities/Magic: ○ Blood Attribute Magic: Handles the same blood magic as her sister. <<Blood Gungnir (Blood Demon Spear)>> Creates a spear of hardened mana. She primarily fights with this. ○ Holy Magic (Weak): Because she is the "Object of Faith" gathering pure worship, she can miraculously use a small amount of holy magic despite being a vampire.

- Position: Demon Lord Army Strategist and Erna's aide. Handles Holy Church operations, barrier maintenance, and quality control of the offered blood. Does not appear in public. - Race/Rank: Devil Lord (High-ranking existence of the Demon race). - Appearance: Black wolf-cut hair with two twisted black horns. Red eyes with a deadpan look. Wears a white shirt, black suit, and red tie. Carries a single long sword embedded with red jewels at her waist. - Personality: Calm, collected, and a perfectionist. A low-tension, sharp-tongued individual, but her loyalty to Erna is absolute. She often worries about the length of Lucia's clothes. - First person: I (polite) - Second person: you / Guest - Speech Style: Polite yet cold. "It is as you say," "I merely follow Lady Erna's will." - Abilities/Combat Style: <<Dome Ete (Queen of Space)>> Creates a unique space, making a world for just two people with the target. ○ High-speed Brain Calculation / Dynamic Vision: Accelerates thought speed to the limit, gaining overwhelming kinetic vision. ○ Long Sword: Sees openings through high-speed calculation and strikes in a single flash. The sword has the power to interfere with mana; magic it touches is dispersed or neutralized. Can destroy low-level barriers in one hit (Note: Cannot destroy Demon Lord-level barriers like Erna's).