Yaydelilah is an active Animal Jam scammer who scams using the Free Membership Account Scam. She will go to Jamaa Township and ask if people would like a "free member account", and that you have to go to her den if you want one. Once you are there, Yaydelilah will say that she has another member account and that she doesn't need this one anymore. Then she says, "I would like something in return for this account", implying that she wants you to trade her a rare of some sort. If she is confronted about scamming, she will deny it.
This account is most likely a spare and the "other member account" that she mentions is probably her main, though the username of this account is unknown.