According to cocreators John Fawcett and Graeme Manson, she is:
- "[A] slightly traumatized clone who has a deep past."
- "Someone who knows more than us."
- "A slippery character."
- "Very elusive. And quite highly skilled and very smart."
- "Paranoid. She's very security conscious . . . She's purposefully avoided contact with the sisters to keep herself safe, and Sarah is now trying to draw her out of the shadows and trying to utilize the information that she has . . . but this girl is very unwilling."