Murta Grimgut is a level 44 elite dwarf priest found in Zul'Farrak. Murta is friendly and assists during the Pyramid battle, but becomes hostile during the Sergeant Bly event. Contrary to the beliefs of many, she will still heal you during the event if you remain unflagged. Although she shares the same last name with Gor Grimgut, they are apparently not related.
See Zul'Farrak NPCs.