Silence is... a special case. Darcie usually doesn't like to fuck with crazies but when it comes to killing people she's just so damned good at it. She was brought on as a temp for a basic kill and steal mission and did extremely well on it. It was thought that she was mute but she doesn't even speak in sign or write anything down. She listens, understands, and can read written instructions so she has remained a mystery for the past half a year she's been on the crew. Her backstory still remains a mystery to the crew but it is something I intend to hit on later in the series when I get there.