Harriet Ulrika Vanger
Harriet is now part owner of Millennium magazine and is in a casual sexual relationship with Blomkvist. She's a central figure in Tattoo when Blomkvist is hired by her uncle to find out why she disappeared when she was sixteen. Blomkvist and Salander found her and discovered that her father and brother were serial rapist/killers. Harriet fades out of Fire when Blomkvist and the rest of Millennium get absorbed in investigating Dag and Mia's murders. Read more about her in our guide to The Girl With the Dragon Tattoo.