Luminous Valentine

"You too, Human. Don't die with such pretentious thoughts. What is justice? Merely crushing evil isn't by itself justice. Besides, who are you to judge my actions as evil or not? There is no form of justice that can satisfy all free will. To think that you can create it is the height of foolishness. Isn't that right?"

- Luminous to Hinata

Luminous Valentine (ルミナス・バレンタイン) is a Demon Lord, the fifth seat of the Octagram, and the True Ruler of Holy Empire Ruberios. She is the ruler of all the Vampires and one of the oldest demon lords.

Appearance
She is a cute silver-haired girl on the verge of becoming a woman. Her heterochromatic eyes glisten in deep crimson and light sky blue. This, among her many strikingly beautiful features, is the most prominent one. When her lips part, they reveal a set of pure white fangs. She is commonly seen wearing gothic dresses but seems to have a penchant for maid uniforms too.

Personality
Luminous is a usually haughty individual who basks in her superiority when sitting on her throne or when acting out her official position as a ruler. However, she has no problems with pretending to be a maid when it comes to hiding her true identity.

She also enjoys classy food and entertainment, so much that she asked for a musical exchange after watching the concert in Tempest's opening festival.

Background
Luminous, born as a remarkable creation of the brilliant Divine Ancestor Twilight Valentine, was hailed as their masterpiece. However, as time passed, Luminous grew weary of her creator's capricious behavior, and with a display of extraordinary power, she ended Twilight Valentine's life using a potent Disintegration spell. Seizing control of the remaining vampire forces, Luminous subjugated Valentin, a formidable and bloodthirsty Vampire. Yet, Valentin's constant antagonism towards her other subordinates posed a significant problem. To maintain order, Luminous made the difficult decision to split Valentin into two distinct beings: Louis and Roy.

In due course, Luminous encountered Gunther, who pledged unwavering loyalty and served as her noble assistant, fulfilling the role of a personal butler. Recognizing Gunther's invaluable contributions, Luminous elevated him to a position of great importance, and he became an instrumental figure in her rule.

Through her indomitable prowess, Luminous earned a coveted position as the fifth member of the esteemed Demon Lord Council. However, her vampire domain, known as "Night Rose", met its demise at the hands of Veldora, albeit with the timely warning from Chloe enabling the evacuation of its inhabitants. Undeterred by this setback, Luminous turned her attention towards a new endeavor: establishing Ruberios, where she concealed her rule from the shadows. To govern Ruberios, Luminous entrusted the role of ruler to Louis Valentin, while she herself assumed a hidden presence. To maintain her influence within the Demon Lord Council, Luminous arranged for Roy Valentin to take her place, attending the Walpurgis Banquets incognito as one of Roy's two aides.

Throughout these tumultuous years, Luminous forged deep bonds of friendship with Chloe and Hinata. When Chloe and Hinata's younger selves ventured into the Central World and vanished from Hero Chloe's body, Luminous took measures to safeguard it by sealing it away, preventing any potential chaos instigated by Chronoa.

Trivia

 * She addresses herself as "warawa," which is an archaic pronoun used by women in samurai families. The author admitted that he intended to paint her as a haughty noble this way, not knowing that it's actually a self-deprecating, humble pronoun.
 * Luminous’ attraction to Chloe and Hinata implies she is sexually attracted to women.