Nyssa is Huon's wife and works for a dressmaker in Lowtown.
Nyssa is involved in the quest On the Loose.
Nyssa tells Hawke that she hasn't seen Huon for almost a decade, but that he promised to return for her soon. She mentions that said he will arrive by nightfall, to which Hawke can agree to protect her.When Hawke returns during the evening, they arrive just in time to see Nyssa being killed by Huon. The mage, clearly insane, justifies that her blood will bring back power to the People. Huon also states that she was a mage herself, but refused using magic, so to blend among the city elves.