— Solveig upon freeing Astrid
Solveig, full name Solveig Fia Bjørnstad, is the protagonist and main character of the Battlefield V singleplayer war story Nordlys. During the winter of 1943, she is affiliated with the indigenous resistance movement opposing the German occupying forces in Norway. Her mother Astrid Bjørnstad, a fellow resistance member, is captured, and Solveig sets off to rescue her while also foiling the German scheme to export heavy water.
Despite a young appearance, Solveig demonstrates traits of an effective soldier - skilled with weapons, determined, and adept in hand-to-hand fighting, demonstrated throughout the story, where she kills dozens of German soldiers without hesitation, and wins unarmed struggles on numerous occasions. Her aggression and combat efficiency is infamous with the local garrison, with Weber mistaking her for a surviving member of the executed Commando team. Aside from her combat skills and physical strength, she is shown to be a capable skier and outdoorswoman, in addition to being resistant to pain and temperature.
Although her mother is deeply involved in resistance activities and is determined to stop the export of heavy water at any cost, Solveig shows some indifference towards the mission and pleads with her mother on several occasions to just return home with her. However, once she is recaptured and Solveig is left to deliver the intelligence satchel to the resistance, she takes up the task herself. Her personality and toughness is well known to her parent, who describes her as "younger that she thinks, and more skilled than she realises", emphasised when Astrid throws her from a bridge down an icy gorge to prevent her capture. This strong sense of responsibility and love for her family leads her to brave both cold and extreme danger to rescue her mother - after collapsing exhausted from hypothermia, it is her mother's voice in her head that spurs her to pull herself to her feet and reach shelter.
Solveig's father went missing following the German invasion of Norway in 1940. As a result, Solveig joined the Norwegian Resistance as one of its youngest members. This strained her relationship with her mother, however, as Astrid did not want to lose her daughter as well. Despite this, Solveig went on several scouting missions and reported any Axis movements back to the British SOE.
In the disastrous aftermath of a British commando raid on the Rjukan heavy water plant, Solveig's mother Astrid was captured and interrogated by Weber. Solveig infiltrates the facility but inadvertently triggers the alarm. Upon locating her mother, Solveig unties and the two embrace. Before they can leave, however, Astrid insists on staying behind to gather intelligence on the transport schedule on the heavy water and sabotage it. Despite her pleas, Solveig is unable to convince her mother and agrees to help with the sabotage. Solveig and Astrid attempt to escape through through a viaduct, only to be trapped by Weber and his men. Forced to surrender and capture imminent, Astrid entrusts Solveig with the intel satchel along with a keepsake - her collar pin - before pushing her daughter over the railing.
Although injured, Solveig recovers and traverses through the valley below in order to deliver the intel to the Resistance. While walking through a narrow pass, however, a strong wind blows the satchel from her hands. Chasing after the satchel, Solveig loses her footing and tumbles into freezing water. Although she was able to reach the bank, Solvieg starts to feel the effects of hypothermia. On the brink of passing out from exposure, Solveig is spurred on by an encouraging hallucination of her mother. Reaching a cabin, Solveig subdues and kills the German soldier inside before fainting.
Awaking in daylight, Solveig looks over the contents of the satchel. Inside was a letter from her mother asking the resistance to "take care of [Solveig]". Inspired, Solveig departs on skis to find the heavy water transport. Reaching the bottom of the mountainside, Solveig comes across a small town on the shoreline. While surveying the town, Solveig finds the transport. Additionally, she observes Weber loading her mother inside one of the transport vehicles. Before Solveig can intervene, however, she is spotted which prompts the transport to escape across the frozen waters. Unable to allow her mother or the heavy water to escape, Solveig starts her pursuit.
Despite Solveig's attacks, the transport is able to reach the rendezvous point, a submarine. Seeing her mother being ushered aboard, Solveig makes a final attempt to save her but is pinned down by enemy fire. The ensuing firefight causes Astrid to be shot in the back by Weber. This shocks and paralyzes Solvieg who becomes surrounded. With no other options, Astrids locks eyes with her daughter before committing suicide with a stolen hand grenade. The ensuing explosion kills Astrid and Weber and destroys the submarine and heavy water.
Solveig's own fate is not shown. Although the war story introduction describes her making "the ultimate sacrifice", the final end card describes that many acts of heroism in occupied countries during the war went unrecorded by history.