Azarell

Azarell was a young elven warrior who dwelt in the dwarven mines of Icewind Dale in the mid–14 century DR, after being separated from her parents. She may have joined the companions in their journey to Menzoberranzan.

History
She could be found by adventurers in the derro mines and offered to "watch over" the party. Azarell was most unusual, possessing incredible strength, and able to cast spells, despite being a fighter. It turned out that Azarell was actually a yochlol in disguise, and could have become aggressive if the party found out.