TheWoWDBIt looks as though she'll be in the first room on your right when you enter Sunfury Spire. It seems as though she'll only appear if you have a max level Horde character. She initiates the quest for getting access to the Battle for Azeroth - Horde allied races.
Elite
Lady Liadrin
Blood Knight Matriarch
The highest voted Wowhead comments for this page. They are community notes, not TheWoWDB comments.
That is every comment on this page.
Details
This roster comes from the current game client's data files, so it is not a complete list of every NPC in the game - older world NPCs that are no longer in the modern client are absent.
Community notes from Wowhead · 1 comment
Top 1 shown aboveThe comments below were written by Wowhead users. They are community notes, not TheWoWDB comments. See them in context on Wowhead.
All 1 comment on this page are shown in Top Comments above.
Level and Map Tracking
The map marks it with vignette 3,223.
The map marks it with vignette 3,668.