Scribe Sigma (real name: Samantha Mayhew) is the main writer for The Archive. She is one of the Gifted, given new memories by The Blind Man. The new memories she was given were from John Kramer (also known as "Sleight").
It was revealed that she first met the Blind Man (whom she and the other Archivists call "Grandfather") when she was sixteen in 1998. She was incorporated into The Archive by Collector Delta. When her boyfriend objected, however, she killed him. Sigma's father was eventually revealed to be Keeper Alpha and that she had a half-sister also named Samantha Mayhew or "Neomaria."