[The fact that it takes a bit for Bucky to catch on that he's being followed says a lot about the skill of his stalker. When he does finally realize, he doesn't let on, goes about his business like normal (this isn't normal, nothing about this place is normal). Who knows who else from their world came through that portal? It could be literally anybody with a grudge against Captain America, or anybody who has beef with him. The list is much too long to narrow down just yet.
First, he tries to find out for himself who it is, in subtle ways, while he spends time with the other Avengers or around his floor-mates. It gives him a smokescreen to act normally. Unfortunately, his stalker is good.
Finally, he decides to go out alone, thinking maybe then he can either lose the guy and figure it out, or draw him out into the open. On the way back from an innocuous grocery shopping trip, taking a different way back to the building, the latter happens, with the stalker trying to drag him down the alleyway.
Bucky drops the bag of food immediately and lashes out with a metal fist to try and escape his hold, slipping easily from his pretend-relaxed civilian demeanor to highly trained soldier in an instant.] Who the fuck are you?!
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First, he tries to find out for himself who it is, in subtle ways, while he spends time with the other Avengers or around his floor-mates. It gives him a smokescreen to act normally. Unfortunately, his stalker is good.
Finally, he decides to go out alone, thinking maybe then he can either lose the guy and figure it out, or draw him out into the open. On the way back from an innocuous grocery shopping trip, taking a different way back to the building, the latter happens, with the stalker trying to drag him down the alleyway.
Bucky drops the bag of food immediately and lashes out with a metal fist to try and escape his hold, slipping easily from his pretend-relaxed civilian demeanor to highly trained soldier in an instant.] Who the fuck are you?!