To restore Ashlyn Alarian's memories, the party took part in a ritual at Celesthem Temple
that drew on the powers of their gods. As part of this, Licia Galewen, a former member of the party, was switched with Lirien - for what reason, they have not been told.
Lirien arrived confused, yet reassured by a divine whisper. She has since faced persecution from various people because of her race - Kazric, for instance, has openly laughed at her for being half-drow, and Mordred was disgusted by her - that she's mostly ignored, and has been incredibly useful in battle, as her mesmerist tricks have allowed her to bolster her allies as her whip has sliced through their enemies.
No notable scars - faint scars from adventuring, but nothing major. She's in reasonably average physical condition.
Her skin is grey with a slight purple tinge, and her silver hair falls to just past her shoulders.
Wears nondescript clothing, keeping herself relatively clean but not so much as to draw attention to herself. Likes to blend in.
Uses a whip and hand-crossbow, both of which are safely stored away on her when not in use.
Rescuing and securing Fort Kildaine
Her biggest failure and greatest regret is that when she was travelling with her mentor and he was attacked partway into the Underdark, she ran, leaving him behind to die.
Towards Emperor Aneirin 'Cyne' of Aletheia