This is so gorgeous and chilling and lyrical and insightful. I love how you really brought out the parallels and circularity between all the characters:
History repeats. Time moves in circles.

I absolutely love this:
You go in your different directions, but you always end up here, back at the station, the place of endless departure and return. Only in the places where the tracks cross, the lines meet, the threads tie, only here can you all exist for each other. Here in these intersecting moments, you make each other who you are; you make each other real.

Absolutely gorgeous fic. Love it! :D