Adam then took Silja to the future to be with Elisabeth and so completed the cycle.
So, Silja’s existence is down to the twisty time travel story running through Dark and is a product of two different timelines with Hannah going from the present-day to the 50s.
Silja and Bartosz’s union is an important one as it means Hanno/Noah was born and carried out work for Adam.
Sadly, when Jonas and Martha Nielsen (Lisa Vicari) managed to break the knot, Silja would have been one of the many casualties.
She was created purely within the knot as a consequence of time travel and is unlikely to have existed in some form in the Origin World.
Dark seasons 1 to 3 are streaming on Netflix now