Agatha

Agatha is a val'kyr in service to the Dark Lady. This is the first person new Forsaken players meet, as she is the one that raises them back into the world of the "living".

She is present for the meeting between Garrosh and Sylvanas, where Sylvanas reveals that the val'kyr have joined the Forsaken. Agatha then resurrects the nearby fallen corpses as Forsaken, much to the disgust of Garrosh and High Warlord Cromush.

Agatha later helps the player by taking them to Fenris Isle and aids the player in fleeing when the refugees from Hillsbrad become Worgen. Agatha later aids in the resurrection of Lord Godfrey and his lieutenants.

When Lord Godfrey betrays and kills Sylvanas, Agatha and her fellow val'kyr Arthura and Daschla sacrifice themselves to resurrect the Dark Lady.

Trivia
The names of the three val'kyr may be a reference to the three precogs in Minority Report named Agatha, Arthur, and Dashiell. In the movie, Agatha is the strongest of the three and most featured, similar to her Val'kyr counterpart.

Quotes

 * Life is meaningless. It is in the afterlife that we are truly tested.
 * I long for the frozen wasted of Northrend.
 * Do you feel it, ? The darkness surrounds us.
 * The warmth of this place sickens me.
 * Through me the Banshee Queen sees all...
 * Different master, same insatiable thirst for power.