Talothral: in The Association path (unlike the gorgon path) a typographical/logic mistake is the succubus (dating werewolf) is called an incubus.
Well, there is still a choice to go to the said demon before you go meet the werewolf... might want to look below the waist when you do >.>.
But no, it isn't a mistake. Naha is an incubus. It's buried in the thread by now, but Incubus/succubus feeds on life energies and souls like all demons. But they are more "gentle" about it, and drain just that little they need to stay in the physical plane during sex. Now Naha is attracted to males, thus he has changed his appearance to be more feminine since a large majority of males are attracted to feminine features, thus increasing the amount of people he can lure.
Now the key difference comes from that Maera doesn't know that. She knows how to deal with them, but she doesn't know this demon personally. Unlike the Fiery Fangs, whose informant Naha is. Simple exchange. He tells them about more dangerous demons roaming around and Fiery Fangs let him live in peace as long as he doesn't go on a murder spree.