World of Warcraft Quests involving Scarlet Hunter:
Felwood Alliance Quest
The Corruption of the Jadefire Kill 11 Jadefire Felsworns, 9 Jadefire Shadowstalkers, 9 Jadefire Rogues, and Xavathras. Return to Eridan Bluewind in Felwood when the task has been completed.
Western Plaguelands Alliance & Horde
Unfinished Business - (Step 1) Kill 2 Scarlet Medics, 2 Scarlet Hunters, 2 Scarlet Magi and 2 Scarlet Knights before returning to Kirsta Deepshadow in Western Plaguelands.
Stratholme Alliance & Horde
Dead Man's Plea Go into Stratholme and rescue Ysida Harmon from Baron Rivendare.
Silithus Alliance & Horde
Into The Maw of Madness - (Step 2) Commander Mar'alith at Cenarion Hold in Silithus wants you to find his beloved Natalia. The information that you gathered points to Hive'Regal in the south as being the area in which you may find Mistress Natalia Mar'alith.
Do not forget to visit the dwarves at Bronzebeard's camp before venturing into the hive. They might have some additional work and advice for you.
And [Name], remember the Commander's words: "Do what you must..."