Who is Suzanna Turquois Blue "Suzy." from Sir Thursday and what is their importance?

Suzanna Turquois Blue "Suzy." from Sir Thursday is a Piper's child who has been alive for centuries. At one point she was in the Architect's Army, but she can't remember much about it because she has been 'cleaned', which is a nice word for having her memories erased. She believes in Arthur's quest and is willing to break the rules to help him achieve it.