Nora is Eric’s centuries-old vampire “sister.” They were both progenies of Godric. In True Blood they do the vampire relationships as familial.
Nora was born in Surrey, England in the 1640’s of the Stuart Era. In 1665 Eric Northman was in London, doing a favor to king Charles II. He wanted a certain woman at his bed, but she was too stubborn to be with him as he wanted. She was instead helping people infected with the black plague. This is highly contagious so he asks Eric to take her out of the situation and return her to him. Eric leaves for the quarantined part of the city where Nora was helping the ill. He asks for her but the man he meets tells him he is too late. Nora had gotten the black death herself and was dying. Eric goes to see her and tells her that the king has sent him to retrieve her. Nora refuses stating her death would be her own. Impressed, Eric sees she is courageous, not stubborn as the king had said. He promises her that she will live forever and takes Nora to Godric to turn her.
Like many siblings, she and her “brother” enjoyed a fiery love/hate relationship. Though she cared for him deeply, and looked up to him, she dedicated her life to a higher purpose. Like Godric, Eric and Pam, Nora spoke Swedish. Nora was a devout religious vampire and when she was captured by the Authority and placed in her cell, the only thing she did is pray to Lilith. When Lilith mercilessly destroyed Godric, Nora finally realized that Lilith was evil and cowered in fear of her.