Finn has been FN-2187 his entire life up until a few days ago. When he wakes from his coma he's in a strange place with a guy he doesn't know (but who looks sort of familiar..?) sitting next to him, and thinks the whole thing was a dream.
His memories come back, but sometimes he blanks and falls back on his Stormtrooper training. He'll respond to certain words or phrases with instincts that have been drilled into him. Or he'll forget and give his designation instead of his new name when asked.
It's getting better, but the line between his old life and his new one isn't clear-cut when it comes to his identity.
Finn/Poe: Amnesia, reversion
His memories come back, but sometimes he blanks and falls back on his Stormtrooper training. He'll respond to certain words or phrases with instincts that have been drilled into him. Or he'll forget and give his designation instead of his new name when asked.
It's getting better, but the line between his old life and his new one isn't clear-cut when it comes to his identity.