All her friends were able to confidently identify the picture of a "house-elf" as being an imp. But only Crocell and Paimon, as the highest-ranking demons who were accustomed to commanding legions of lesser demons and were generally well-informed about mortal goings-on, were familiar with what they were doing on earth, and how they’d ended up bound to wizards for generations. A brief whispered consultation between those two determined that they both knew the same information. In the end, everyone departed except for Crocell, whom as her particular patron and friend always had the most patient interest in chatting with her.