Silja is a member of the band of survivors who in 2052 roam the forest outside the ruins of Winden. She knows sign language, giving her an important role in the group as the interpreter for their deaf leader, Elisabeth Doppler.
Silja is one of the first people Jonas Kahnwald encounters when he arrives in 2052. The young girl with long, dark hair says, "Welcome to the future," then knocks him unconscious. Jonas becomes a member of their group, which awaits the day the passage will re-open, and often discusses Sic Mundus.
Elisabeth has forbidden anyone from entering the restricted zone around the ruined nuclear power plant. Jonas is caught violating this rule, and barely escapes execution. Silja helps him, but demands he take her to the ruins to show her what is there.
She is with Jonas when he manages to stabilize the dark matter and travel through the time portal. She waits for him to return for some time, but eventually must return to the group. As she crawls back out through the hole under the wall, she is caught much in the same way Jonas was. She confronts Elisabeth, demanding to know why her leader hid the truth of what was in the restricted zone from the rest of the group. Elisabeth says only that what was there was not a piece of God, but of the devil.