Vermeil (ヴェルメイ, Verumei?) is the lead female protagonist of the Kinsou no Vermeil series. She is a devil who has features of a succubus, though it is not yet known if she actually is one. She enters the story by being summoned by Alto Goldfield from a book that she was imprisoned in three centuries ago. She is considered powerful even by devil standards, able to destroy a city with a single attack if pushed hard enough.