Lena Feldt was a witch. Her dæmon had the form of an arctic tern. She died after being attacked by Spectres set upon her by Marisa Coulter. Lena was able to make herself invisible using witch magic. It took her ten minutes to complete the spell.
Later, Lena was sent to spy on Marisa Coulter. She made herself invisible, and witnessed Coulter murder Carlo Boreal. Coulter was able to see the witch despite her spell, and tortured her by using the Spectres which she controlled to attack Feldt's dæmon. Under the torture, Lena revealed information about the whereabouts of Lyra Silvertongue and how she was protected, and told her that Lyra would be the new Eve. Lena herself was then attacked by the Spectres.
|Witch clans||Lake Enara clan • Keitele clan • Lake Ladoga clan • Lake Lubana clan • Micokojärvi clan • Nania clan • Onega clan • Taymyr clan • Tikshozero clan • Lake Umolese clan • Lake Visha clan|
|Clan queens||Ieva Kasku • Julia Ojaland • Juta Kamainen • Katya Sirkka • Paula Pyhäjärow • Reina Miti • Ruta Skadi • Sara Leiro • Serafina Pekkala • Tanja Lentana • Tilda Vasara|
|Other witches||Lena Feldt • Medea • Serafina Pekkala's mother • Yelena Pazhets • Tortured witch • Unidentified witch|
|Important||Yambe-Akka • Cloud-pine • Holding spell|