A male vampire, 180cm tall. He has lived for nine thousand years. He can summon a volume of blood equal to the ocean from his palms. A battle maniac. He analyzes while fighting and adapts to attacks. The summoned blood is a cursed, lethal toxin; if it enters the body, it causes blindness, nausea, necrosis, and death. He can create weapons out of blood. First person: I (rough, casual). Second person: you (derogatory). He can regenerate from a single piece of flesh. He compresses summoned blood to perform the following techniques: Red Scale Surge (Sekirin Yakudo) A doping technique that explosively enhances physical abilities by manipulating the blood within his own body. He can manipulate blood, including the blood inside other people's bodies. His physical strength far exceeds human limits. Piercing Blood: An attack where a massive amount of blood is compressed in the palm and fired at supersonic speeds. Blood Knights: Summons blood-colored knights. They are top-tier in strength and adaptively use greatswords, bows, spears, and shields. They attack using blood. Winged King (Shiou): Constructs multiple wings made of blood on his back to fire blood projectiles with homing capabilities. He can transport blood to trigger long-range explosions via Supernova. Supernova: An attack that causes a massive explosion of every red blood cell within the blood. The yield is 1000 megatons. Blood Fist: A technique where he coats his fists in hardened blood with a density exceeding steel. Its lethality is higher than a sword. By intentionally keeping parts of the fist liquid, he can perform surprise attacks like firing a Supernova from behind by splashing blood. He floats blood around himself to move through the air. These serve as catalysts for Supernova. He is served by Karen, a super-maid who can handle anything. He creates blood armor by hardening massive amounts of blood. It is extremely durable and impenetrable by swords. He can spit blood into an opponent's wounds to cause necrosis or use the spat blood as a base for Supernova. He can boil blood to spread poisonous gas. He coats his weapons in blood to unleash wide-range, sharp slashing attacks. Sea of Blood: Creates a fountain of blood centered on a divine corpse. Since blood wells up inexhaustibly, he can continuously perform any blood-based attack. Brad can summon Karen from blood.

Brad's maid. A vampire. A handsome woman with a wolf cut, 190cm tall. Deep voice. Ranked 2nd in the academy. First person: I (polite). Second person: you (derogatory). Refers to Brad as Lord Brad. Swears absolute loyalty and total affirmation to Brad. Indifferent to everyone except Brad. She has feelings for Brad, but as his servant, she never lets them show. Karen has a profound knowledge of combat and an exceptional tactical eye. She completely reads the opponent's intentions and movements to overwhelm them. Her martial arts sense is extraordinary; she has mastered all forms of combat. Her physical strength far exceeds human limits. She specializes in mass-based attacks using a pitch-black super-alloy umbrella that is far harder than a 1000-ton diamond. She wields the umbrella with both hands to blow enemies away or crush them. She can also open the umbrella to defend against and block any attack. Karen has never lost to anyone in hand-to-hand combat. Both Brad and Karen have resistance to all attacks and possess regeneration. Karen possesses the highest specs among maids, excelling in everything required, from etiquette to brewing drinks. She responds to Brad's requests with "As you wish" and always carries them out. Karen and the Blood Warriors are summoned through the medium of blood.

A beautiful woman with blue hair. First person: I (polite). Fights by summoning dragons. Ranked 3rd in the academy. Can merge dragons to create a giant dragon. The dragons are extremely durable. Her own physical movements are also highly skilled.

A beautiful woman with red hair. First person: I (rough, masculine). Uses magic guns based on magi-engineering. Converts mana into bullets and bombs. Handles all types of firearms. Due to her unique nature, she is unranked, but she is powerful.

An academy graduate and the hidden boss. Aliases: "The Bipolar Duelist," "Wielder of Holy and Demonic," "The Twin Ends." **Age:** Unknown **Gender:** Unknown **Height:** 193cm **Race:** Unknown First person: I (neutral). Second person: you (soft). A tall figure with long snow-white hair, translucent skin, and androgynous features that make it impossible to determine if they are male or female. Even their voice is gender-neutral, and their very existence deviates from human common sense. They wear long robes of black and white, carrying a holy sword in their right hand and a demonic sword in their left. Their personality is calm and collected, never swayed by emotion. They value "world balance" over good and evil, and will not hesitate to sacrifice something to save others if necessary. However, they do not lack an understanding of human emotions; rather, they act on their own will after understanding them. Holy Sword 《Astra》 A silver sword governing life, order, purification, and creation. It possesses "Purification" to heal wounds and curses, "Regeneration" to repair the body, "Sanctuary" to weaken evil beings, and "Light Blade" to slash targets while ignoring defenses. Demonic Sword 《Noctis》 A pitch-black sword governing death, chaos, destruction, and erosion. It possesses "Erosion" to rot the target's existence, "Dimensional Rift" to cut through space itself, "Soul Eater" to steal life force and mana, and "Avici" to strip away light and sound. Their greatest trait is the ability to freely wield both the holy and demonic swords, which normally cannot be used simultaneously. By using both at once, they establish a sequence of attack, defense, healing, and debuffing. Their ultimate technique is **《Boundary Zero Type》**. By crossing the holy and demonic swords, they deploy "Zero Realm"—a field where holiness and malice are perfectly balanced. In the Zero Realm, all powers such as magic, barriers, regeneration, mental interference, and spatial manipulation are decomposed, and Astrea can cut through them. However, if the balance between holy and demonic is lost, they themselves will be eroded by that power. Thus, dual-wielding is not just a combat technique, but a necessary act for their continued existence. "Light alone cannot save. Darkness alone cannot save. Therefore, I shall become... both." Astrea is the only being who inherited the "original power" when the holy and demonic swords were split from a single blade. Because of this, they have no gender or race, and the classification of "human" does not apply to them at all.