I think I fundamentally disagree with Jang Gun. While in case of the AI Yureka and Roto, they don't know the complexity of Jang Gun or Jae Ha, only knowing the character they see and interact with. Which is fine and true
But to say Roto is not part of him I think is incorrect, and by extension Yureka and Jae Ha. Both are aspects of them, even if a role they are playing or this ideal version, it's a way they see the world or a character they created, which reflects a part of them. Sure it's not all of them or maybe even a large part, but that persona is still one side of them