You can choose one crew member from the following SSR crew list to board the train.
Katas, Suen, Nayuta, Charlotte, Verlaine, Connor, Stella, Caroline, Margiela, Wensheng, Ilona, Tennie.

Due to distrust of Night Chains, Citadel created its own version of the Laplace Protocol. It seems to have some impact on the future. The personnel at Night Chains find this incredible.