|Everyone must've escaped! It means nobody here was eaten. Including your family, too.|
|— Lynne comforts Conny|
Lynne had long, brown, messy hair that she kept in a ponytail with her bangs parted down the middle. She wore the traditional uniform of the Scout Regiment with a white shirt underneath.
Lynne was serious about her job, but considered the feelings of the people around her. While she was serious about her mission and objectives, she took the time to make Conny Springer feel better about the seemingly hopeless situation in his hometown by convincing him that everyone escaped without being eaten by Titans when Wall Rose was supposedly breached.
They find the village deserted, but there are no dead bodies and no sign that anybody has fled. Lynne comforts Conny Springer, who fears his family has been eaten by Titans, arguing that they probably all escaped due to the lack of blood and bodies. The squad rejoins with Nanaba and Henning's squad after failing to find any breach in Wall Rose. As night falls, the two groups take refuge in Utgard Castle.
Utgard Castle soon comes under attack from numerous Titans capable of moving during the night. During the ensuing fight, Lynne and Henning separate from Gelgar and Nanaba to check on the rookies within the castle and they are both struck by a projectile thrown by the Beast Titan and killed instantly.
During the Battle of Shiganshina, as Erwin Smith begins to lament the dwindling hopes of his dream, Lynne stands among the many fallen Scout Regiment comrades in Erwin's mind, wanting to know if their deaths had meaning.