You can select a passenger from the following list of SSR passengers to board the train.
Joshua, Katas, Suen, Nayuta, Charlotte, Verlaine, Connor, Stella, Caroline, Margiela, Wensheng, Ilona, Tennie, Ithos, Lycagia, Arina, Nicola, Dorothy, Dustin, Sommer, Shire, Anfiya, Lissandra, Jalhay, Paladi, Hayabusa, Pelota, Raziel The Reminisce, Raziel, Olivien, Lycagia, Ren, Masaki, Reeva, Chloe, Komugi.

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