My theory on this is that it's possible that the "third alter" is the cynical side of Elliot that just can't stand the bullshyt and tends to go into angry rants and will throw hands when necessary....
Any truth to this brehs? I cant check it right now
Original Elliot: is the loner that keeps to himself, keeps his thoughts to himself, operates in the shadows and only keeps a hand full of people he's dear with close to him (Darlene, Shayla, Angela)
Mr. Robot Elliot: is the more confident, goal driven, charismatic, direct and will do almost anything for his hidden agenda but won't cross certain lines... he keeps his cards close to his chest
Cynical Elliot: is the alter that GIVES ZERO fukkS and will burst into Spike Lee-type rants on how the world is bullshyt and should be burnt down, so I can see this personality not giving a fukk if Vera is back cause it would give him a chance to shoot his ass. I believe we've seen the "third alter" clearly in these scenes specifically: