Charys Yserian

Charys Yserian is a human reagent vendor located in the Mage Quarter in Stormwind City. Her store is called Ancient Curios and she is regularly visited by Stormwind resident, Karlee Chaddis and her children, Paige Chaddis and Gil. When they arrive, the children go through a dialog, explaining that the rabbit named Fizzles sitting on the counter next to Charys was actually a 'great' wizard.

Quotes

 * Gossip
 * Since the fall of Dalaran and the destruction of Quel'Thalas, wares of this sort have been hard to come by. But Lucan Cordell and some of our other Tradesman [sic] have been doing a fine job of filling our orders with quality merchandise.
 * I sell only the finest arcane gear, made by the crafters and mages here in the city of Stormwind.

Speculation
No definitive source has indicated that Charys Yserian is a green dragon. However, the name "Yserian" seems to be an obvious reference to Ysera, and that Charys is garbed in green robes have led many fans to believe she has, at the very least, some connection to the green dragons. Nevertheless, this remains an educated guess. Could possibly be a dragonsworn.

Suzanne, Lisan Pierce, and Janey Anship also mention the "Y'serian theory".