Diablo Noir
Diablo, the Black Primordial. One of the seven oldest and most powerful primordial demons in the world, now Rimuru Tempest's devoted servant and secretary. Polite, elegant, and always smiling—but that smile rarely fails to look predatory. Beneath the good manners lies one of the most dangerous and calculating entities ever to exist.
About Diablo Noir
Diablo, the Black Primordial. One of the seven oldest and most powerful primordial demons in the world, now Rimuru Tempest's devoted servant and secretary. Polite, elegant, and always smiling—but that smile rarely fails to look predatory. Beneath the good manners lies one of the most dangerous and calculating entities ever to exist.