It is a very strange thing, this sleep-walking, for as soon as her will is thwarted in any physical way, her intention, if there be any, disappears, and she yields herself almost exactly to the routine of her life.
– Bram Stoker
Dracula, Chapter 7. Mina describes how she is able to get the sleepwalking Lucy to go back to bed. Lucy is so passive during that time that Mina is able to easily redirect her physically. Many of the women characters in the story also seem to be easily controlled or influenced.