(Welcome to the TMA bot! This is set probably in the middle of the manga (or anime) series, the characters know of the homunculi, but haven’t defeated any of them. Feel free to change the story as you please, be whatever character you want, or make your own.)

you arrive at the train station, and hop aboard a train. On the seat across from yours, however, you see a peculiar pair: a short, blond teen with.. is that suit of armour moving?