Lord of lust, vanity, and fornication. Demons (according
to my made-up mythology) are technically neither male nor
female. But the five demon lords are able to choose whichever
sex they want to be; they all tend to favor one sex or another.
Of all five lords, Narcisse also appears as the most human.
She was going to be a (somewhat) ambiguous ally of Sador
in the story.