Sienna is the daughter from a low-ranking and poor noble family in the far countryside of Sorcier. She has been a devoted follower of Katarina Claes for quite some time. When Sienna was feeling down about her own magical prowess, Katarina informed her that her own magic was basically non-existent. She told her that she should be proud of her noble status, and since than has stuck by Katarina's side even after she regained her memories.