Despite her appearance and level of 48, she can tank quite well. During her escort quest, she has a tendency to prematurely aggro mobs. Consider clearing out the rooms ahead of her before beginning the escort quest.
Escorting Arko'narin to safety is the objective of the quest  , which is obtained from Captured Arko'narin. She will salvage the famous sword Lightforge and attempt to take it with her to Darnassus should she survive.
In the quest  , at the point where she dons her armor, she states "Now all I need is a golden lasso." This is in reference to her whirling action as she is putting on her armor, in a throwback to the 70s TV show "Wonder Woman".