Surena Caledon is a level 9 human found at the Brackwell Pumpkin Patch in Elwynn Forest. Prior to running off with Erlan Drudgemoor and the Defias Brotherhood, Surena was a student of Gakin the Darkbinder.
Gakin would like the bloodstone-choker, that he gifted her, returned.
When completing the quest Gakin speculates her being a succubus:
Sometimes, I wonder if Surena was not a succubus in disguise, sent to warp and twist my mind... Ha! I give her too much credit, I think.