When she moves forward, just slightly, he takes a step back, gloved metal fingers tightening around the strap of his shield - his shield, no matter what this stranger wants to say, and he won't let anybody take it away from him. Especially someone who doesn't know what he's done, what he's been through, how hard he's tried to deserve it.

"It's not relevant." He doesn't want to talk about it. Doesn't want to voice aloud what happened to his Steve and air his personal pains to someone who doesn't even know them. Her obvious hostility is good, in a way, because it lets Bucky distance himself, build up the walls around himself again.