Pernilla is Blomkvist's daughter, a little older than Harriet was at the time she disappeared. Pernilla seems to love her father, but doesn't see him very often. We think she could definitely follow in her father's detective footsteps. Without her Biblical knowledge, Blomkvist and Salander might never have cracked the case of Harriet Vanger. She's the one who recognizes that the numbers next to the names in Harriet's date book as a series of famous passages from the book of Leviticus. So, bonus points for Pernilla!