"An elf lady who manages challenges and their rewards."
Race: Elven
Members: Yes
Location:
Mistress Heriau can be found in the Tower of Voice at the centre of Prifddinas and at the Max guide in the Cadarn district.
Notes:
Talk to her to turn in a daily challenge or to toggle which skills to stop receiving challenges in (assuming you have reached 99 in that skill and 120 in Dungeoneering).