The Group met Satin in the Forest of Wyrms and made a deal with her to get into the Cult of the Dragon's outpost in exchange for the group getting rid of the Lizard-folk that took over her home while she was "gone". Satin is the largest Green Dragon you have ever seen and while she walks among humans and humanoids, she takes the form of a very comely female wood elf. Other than that, Satin is a complete mystery to you.