Some time before the series began, Linnea joined The Thirteen.
Soon afterwards the witches choose their wyverns and begin training for the War Games. During a two-day rest period, Manon notes that Lin is among those of her Thirteen to take advantage of the break to see to their baser needs with the men across the mountain. When the War Games start, Lin joins the Thirteen in competitions for the right to lead the witch host, and celebrates their victory with the rest of her coven.
After winning the War Games, Manon, the Thirteen, and half the Ironteeth witches are sent to Morath to assist Duke Perrington. After four weeks in Morath, Manon and the Thirteen become suspicious of the strange goings-on and grate against Duke Perrington's orders. Lin accompanies Manon to a meeting with the Duke and stands guard outside his council room. On his orders, Manon takes her Thirteen hunting for people living in areas near Morath.
The Thirteen take Kaltain Rompier, Duke Perrington, and his men to a tribe in the White Fang Mountains and Kaltain tortures them with her shadowfire. Duke Perrington then has the Thirteen slaughter the tribe.
The Thirteen are meeting when they’re interrupted by a man with a Valg inside him. He attacks them with darkness and mental pain. Manon kills him while the human trapped inside, Roland Havilliard, begs for death. Manon looks on in horror at the effect that the Valg powers have on those among the Thirteen without golden eyes. Because Lin has gold in her eyes, she is unaffected by the Valg powers.
The Thirteen barely escape the explosion caused by Kaltain that destroys one-third of Morath, which includes the destruction of the evidence of the Thirteen’s actions. The Thirteen drop Elide Lochan off in the Oakwald Forest and send her on way before returning to Morath. The Thirteen decide to stay at Morath until the Matron arrives and then they will decide what to do.
Manon and the Thirteen tensely greet the Blackbeak Matron and coven at Morath. The Thirteen are sent on a mission to take control of Rifthold and bring Dorian Havilliard, now king, to Erawan if he survives. They are also ordered to destroy the glass wall Aelin Galathynius made surrounding the palace. Before leaving for Rifthold, Manon tells the Thirteen not to let anyone kill Dorian. Lin participates in the sacking of Rifthold. She then attends Manon’s trial for the death of five Yellowlegs witches.
At sunrise, the witch killing ceremony starts. The Thirteen give Manon the gesture to honor a Witch Queen. Muttering ripples through the crowd and Manon knows that she can't allow this death to happen. She screams at the Thirteen to run and whirls to kill her grandmother instead. The Thirteen are able to escape on their wyverns.
The Thirteen arrive at the beach in Eyllwe and join in the battle against Maeve's armada. They help Rowan and the group win the battle. The Thirteen is reunited with Manon afterwards. Manon asks them if they heard the truth about her parentage and if they will still follow her. Asterin tells her that they will, and once again the Thirteen give her the gesture honoring a Witch Queen. Manon declares that they must become better than their foremothers. Manon, the Thirteen, and Dorian promise the group that they will find the third Wyrdkey and the Crochan witches to unite them to fight with Aelin.
For the past two months Manon, the Thirteen, and Dorian Havilliard have been hunting for the Crochan witches. They are currently in the White Fang Mountains. Manon is worried that Dorian might have to be the sacrifice to forge a new Lock.
The next day the group is preparing to move on when Manon is attacked by a mighty, white bear. Dorian freezes the creature with his magic and it shape-shifts into a Stygian spider. The spider is Cyrene, the spider who Manon encountered to get spidersilk for Abraxos’ wings. She tells Manon that she tracked her scent using her belongings left at Morath. She says that there are Crochan witches nearby.
Cyrene leads the group to the Crochan witches who greet them with mistrust. Glennis Crochan introduces herself as Manon’s great-grandmother. When two Yellowlegs covens attack, Manon, the Thirteen, and Dorian, help the Crochans kill them, which gains them some trust. Dorian realizes that Manon deliberately attracted the Yellowlegs to try and gain the Crochans’ trust. Manon and Dorian explain that they are there to ask the Crochans to fight against the Ironteeth witches and Erawan’s army.
Glennis tells her that only a Crochan Queen can summon them to war, and Manon has not been accepted. She says that they are on their way to Eyllwe to answer a call for aid by the southern hearths. The group and the Crochans are delayed for a week while they heal from the Yellowlegs attack. When Vesta suggests Dorian train, he declines saying, "I just watched Lin nearly knock Imogen's teeth down her throat... I like my teeth where they are." When the group is too late arrive in Eyllwe, Lin helps bury the dead, earring some more respect from the Crochans.
When the Thirteen and Manon go to the Ferian Gap to speak to the witches under Petrah Blueblood's command, Lin is there. Back at the Crochan camp, a Crochan scout reports that Terrasen has sent out a call for aid. Manon, as the Queen of the Crochans, spreads the Flame of War to call all Crochan witches to aid Terrasen in the fight against Morath.
Orynth readies for battle as the Ironteeth aerial force approaches, 1,000 strong. Fortunately, Manon arrives at the same time with the Thirteen and 5,000 Crochan witches. The surprise buys them a day. The next day during the battle, Abraxos is hurt and Manon is unable to stop the Thirteen as they sacrifice themselves by performing the Yielding in order to bring down the final witch tower before it can destroy the castle. Lin is the second to go down.
Lin was described as being very violent; she was prone to attacking people who called her by her full name, which made her a capable sentry. Dorian notices that Lin still seems like she was debating carving him up to examine his insides.
Not much is known about Linnea's appearance, other than that she has gold-flecked black eyes, black hair, and olive skin.
Skills and Abilities
- Ironteeth physiology: As an Ironteeth witch Lin possessed sharp, retractable iron teeth and nails.
- Immortality: Lin was immortal as a result of her witch heritage.
- Magic: Lin had inherent magical power that could be released in the form of the Yielding.
- Flight: Lin was capable of flight through riding her wyvern or on her ironwood broom.
- Linnea was said to have had a soft-hearted mother, whom Lin's grandmother killed. This might account for her violent reaction to being called by her full name; her mother was the only one who called her that.