Akuma no ana uketsuke jō

She the unnamed demon receptionist at the "Demon Hole", a demon's brothel in the Succubus District. Like other receptionists, she's in charge to welcome customers, to take the entry fee and to explain how the establishment works. As a demon, she and the other have a "contract fetish" and this means that only customers with a contract will receive a great service, while the others will just be squeezed from every bit of money they have.