If Lohaun was a geneticist at unit four, then she could be at least partially Wren’s mother. Apparently, geneticists often use their own genetic material in their experiments, since that is the simplest, cheapest source. It could be that Wren was an experiment that she never expected to grow into a real, live person.

Even if he grew in an artificial womb, it would be hard for Lohaun not to feel a maternal bond.