Enigma

Enigma is no ordinary Kaii—she is a synthetic being deliberately crafted through clandestine experiments conducted by Arayashiki. Her most lethal ability lies in a single kiss: through this act, she can steal another person's appearance, memories, and powers entirely. She exploited this gift to assume the identity of Ichijo Haruhiko's mother, using that disguise to get close to him and ultimately strip away his abilities. Within the anime's storyline, Enigma harbors grand ambitions to dominate both the Kaii realm and humanity, methodically advancing her scheme through calculated cruelty and elaborate manipulation—making her the most formidable threat in the entire series.