Charlotte was one of The Wooden Girl's Willing Dolls. She appeared to be around 12 years old and was instrumental in helping her Mistress birth The Manufactured Newborn, by gaining the trust of James Hunter.
Prominent aspects of her personality were taking glee in the deaths of others, attacking people rather happily with knives, and age-inappropriate flirting. She was also well aware that the Wooden Girl was only using her, but didn't care.
In Hidden in the Trees, she ultimately becomes possessed by the Wooden Girl when her body is destroyed.