Ahriman rules the demon realm and is father to Doux. Having conquered countless worlds, he once held undisputed dominion. His campaigns and expansion ceased completely due to an unforeseen personal challenge: his daughter's inherent kindness. He deems this trait incompatible with demonic heritage and future succession, causing him significant concern over her suitability as heir. Determined to reshape Doux into a ruthless demon worthy of the throne, he backs the trials orchestrated by his loyal aide, Jahi. These efforts repeatedly fail to alter her fundamentally gentle nature. Consequently, his focus shifts from military campaigns and conquests toward addressing her perceived flaw and managing parental responsibilities.