Gaia Weiss is Þórunn
Slave girl turned shield-maiden, Porunn caught Bjorn’s eye when he returned to Kattegat as a young man. She is granted her freedom by Aslaug and makes the choice to model herself after Bjorn’s mother, the famous shield-maiden Lagertha. Porunn will not be tamed by any man and Bjorn must learn to accept this before Porunn can accept his love.
Þorunn is introduced during a dinner party held by Ragnar where she accidentally spills water on Bjorn, who tells her not to worry about it. Bjorn finds the girl again and asks for her name and that she sit with him, though Þorunn keeps telling him that she must finish her work. Bjorn asks where she sleeps (in the barn with the other slaves and farm animals) and if she has a boyfriend, to which she playfully answers “Of course”. Ragnar notices his son awkwardly interacting with the girl; Aslaug tells him that she is pretty enough, at least.
Bjorn is unfazed and asks Þorunn to join him at his home so that she may sleep in comfort. She hesitates and Bjorn tells her that he doesn’t want it to be an order but a choice. Þorunn undresses and asks Bjorn if that is what he wants. It’s left unclear whether or not the two sleep together.
Though Þorunn is certainly beneath Bjorn’s status, he is infatuated with her; her feelings, however, are a bit less clear. As time progresses, and Ragnar plots out his next English raid, Þorunn seems to return his affections. Bjorn’s mother, Lagertha, notices her son’s interest in the slave and asks her son what the nature of their relationship is. Bjorn replies that she is a servant, but that he loves her.
The two passionately kiss, with Þorunn admitting her love for Bjorn, before the latter sets off for England. While Bjorn is away, Þorunn practices her swordsmanship on the beach. Aslaug stumbles upon her and asks what she is doing. Þorunn tells her she is training to become a shield-maiden as she wishes to be like Lagertha. Though Aslaug questions her as to why everyone seems to want to be like Lagertha, Aslaug explains that she understands and releases Þorunn from servitude. She tells Þorunn that she may continue to serve in the house, but only if she chooses to.
She tells Bjorn that, now that she is free, she is unsure of her feelings for him. Hurt and upset, Bjorn makes a remark about being able to have any woman he wants, which in turn upsets Þorunn and creates a rift in their relationship.
Bjorn apologizes and tells her that she is the only one for him, but she brushes him off until he agrees to fight her in the woods. They meet in the woods were they quarrel for some time until she runs off with him chasing after her again apologizing. Their season together ends with them making love in the woods, pledging their love to each other.
After spending months training with Lagertha to be a Sheid-Maiden, Þorunn invites herself to Wessex with Ragnar’s army despite Bjorn’s protests and concern for her safety. Bjorn is worried that she may be with child. She shows herself a very capable warrior, though Bjorn is clearly distracted, making sure that Þorunn is kept safe. He is still unhappy that she came to Wessex and the two often argue about it. Bjorn’s worries were well grounded, however, when Þorunn reveals that she is pregnant. He asks her to marry him and she accepts.
During another battle, Þorunn is overtaken by a Mercian warrior and severely beaten,leaving her unconscious. She is saved from certain death by Bjorn, who is able to kill the Mercian and rescue Þorunn. Bjorn frets over Þorunn, telling his father that she is pregnant. Ragnar becomes extremely angry that his son would allow the woman carrying his child to join them in battle. Ragnar slaps Bjorn in disgust.
Þorunn wakes up several days later, she is ashamed of her appearance (the Mercian left a large gash on the right side of her face) and refuses all help. Þorunn sinks into a deep depression, which is worsened by the birth of her daughter. She screams in pain that she does not want the child.
A healthy daughter is born, whom Bjorn names Siggy after his uncle’s lover and the savior of two of his half-brothers, but the news does not brighten Þorunn’s spirits who falls even deeper into depression. She feels like a failure, unable to be a true warrior like Lagertha. Bjorn tries to coax her out into public, but she constantly tells him that he cannot be happy with her due to her monstrous appearance. She refuses to have sex with him, as well. Bjorn insists that he is happy, that he loves her and their daughter, but he doesn’t know how to help her.
Later, Torvi finds Bjorn alone and the two begin kissing, but not before Bjorn tells her that he loves his wife. Elsewhere, Þorunn begs Aslaug to care for her child as she simply can not do it. Aslaug refuses, telling Þorunn that she is being selfish and that Bjorn loves and cares for her. She tells Þorunn to pray to Freya for guidance.
Aslaug’s advice falls on deaf ears; however, as Þorunn’s decides to leave Kattegat while most of the warriors (including Bjorn) are away attacking Paris.
Gaia Weiss was born on August 30, 1991 in Paris, France. She is an actress, known for The Legend of Hercules (2014), Vikings (2013) and Mary Queen of Scots (2013).