| Quote #1
[Armansky:] "You're not a person who encourages friendship," he said. (2.24)
Armansky's not telling Salander anything she doesn't already know. She hasn't had too many good experiences with people, though some major details of her troubled past don't emerge until the final installment of the trilogy.
| Quote #2
He relaxed and the anxious knot in his stomach had eased. She had that effect on him. She always had had. And he knew that he had the same effect on her. (3.36)
Although sex is a major factor in Blomkvist and Berger's relationship, this quote gives us the real key to their friendship. They argue and bicker a lot, but they ultimately understand and enhance each other's personal and professional lives.
| Quote #3
Around 7:00 he heard a loud meowing at the door. A reddish-brown cat slipped swiftly past him into the warmth. (8.112)
Blomkvist's friendship with Tjorven the cat isn't a huge factor in the plot, but it helps us see how friendly Blomkvist is, in contrast to Salander.