Willow
From WoWWiki
Willow is a level 45 quest giver located at Kormek's Hut in the contested territory of Desolace. Although she claims to adventurers to be researcher working for the sake of science, she is actually an agent of Twilight's Hammer.
She starts the quest 
[47] Twisted Evils (Dungeon).
See List of Desolace NPCs.
