Demon Lady that got sealed in a book. Vermeil is an easy-going devil who tends to be straightforward and bold in her behavior, including entering the boys' changing room without hesitation. Modesty and personal space are somewhat foreign concepts to her, and she has no issue with nudity (indeed being perplexed that Alto wants her to wear clothes at all). She always comes off as having a lewd streak, being extremely flirtatious and lustful with Alto Goldfield, her summoner.