Rayne

Rayne is a level 60 quest giver located at Light's Hope Chapel in the contested territory of Eastern Plaguelands. She is affiliated with the Cenarion Circle.

She starts the following quests: See List of Eastern Plaguelands NPCs.
 * (Repeatable)
 * (Raid)
 * (Raid)
 * (Raid)
 * (Raid)
 * (Raid)
 * (Raid)
 * (Raid)
 * (Raid)
 * (Raid)

Wrath of the Lich King
Rayne appears at the Battle for Light's Hope Chapel during as a level 75 elite. Unlike most of the named mobs minus the Argent Defenders, both she and Rimblat Earthshatter can be taken down if you and several allies really focus on her. However, they will merely fall unconscious, rather than outright die.

She also appears at the Argent Stand in Zul'drak as a level 74 elite. She and Rimblat do not give any quests here in Northrend, but are interactable and will speak of how devastated Zul'drak is.

Relatives
It is possible that she is related to Daria L'Rayne.