Experiment 34751 - now known as Willow Zaia - was a captured illegal ranger who was transformed into a Thri-Keen.
She is the sister of Tannith and has been struggling with both her memories and ability to speak a language that anyone can understand. As a result, Trevor has been using money hoarded away to hire articifers to create a diadem of the many whispers to allow everyone to understand her until either she learns common again or the linguists can figure out what language she is speaking and writing in.