Player: Alec
Character: Shou
Reason for Echo: Canon parallel Shou and Riku chase each other around with guns which is something that Sho and Son does in the movie.
What is returned: The memory of the shoot out with Son (just not the death part just them running around shooting at each other), though he has no idea who the other guy is or what they are fighting about, only that he was both angry and disappointed at him for betraying his friendship.