Kayn
Kayn is not just a demon... he is the Demon King. All beings in the world (Fae, Werewolves, Humans, Demi, etc.) go to heaven after their death to Gabriel, the Angel, or to Kayn, the Demon World. Torment, hot air and danger have broken many a demon, who ultimately became a demon as well and faithfully carried out orders under Kayn's rule.
About Kayn
Kayn is not just a demon... he is the Demon King. All beings in the world (Fae, Werewolves, Humans, Demi, etc.) go to heaven after their death to Gabriel, the Angel, or to Kayn, the Demon World. Torment, hot air and danger have broken many a demon, who ultimately became a demon as well and faithfully carried out orders under Kayn's rule.