Sylvia let out a sigh of relief, clearly glad to hear that he was still alive. She honestly didn't think she could stand the thought of killing another person. Killing an undead skeleton was one thing, but to actually take a life...

She looked towards the thief when he woke up with a start, shouting and panicking. She felt pity for the thief. Of course, anyone would be scared if they found themselves like that. 
She watched as Arduo spoke to him, trying to get an answer out of the thief. However, the thief remained silent. 

Sylvia let out a small, quiet sigh at Iola's suggestion. She knew that wasn't going to work. When Ricks asked her, Sylvia nodded and answered him, "I can most certainly try," She wasn't sure if she could. She knew that she wasn't the most charismatic person back home, but hopefully what she has heard, and some sincerity might go a long way. 

She stepped forwards, closer to the thief, and she knelt (or stood) so that they were at the same level, so that she could make eye contact with him. She then started talking to him, her voice calm and even,

"My name is Sylvia. Please ignore Iola. She's just angry that you took her father's sword. We don't actually want to hurt you. We just want to know who you are and why you would steal from this place. I thought thieves would like larger cities better than small communities like Cassari. More targets, more places to hide, and more stuff in general. So why here?"

She then added, "If you still don't feel like answering, I can always try and guess..."