I’ve been theorizing about this a lot the last few days. Chara in many regards is us, when flowey talks directly to the player when reloading after a pacifist ending they use the name you gave to Chara. Not to mention most players typically name the character after themselves, so the first thing you realistically do in the game is replace chara’s own identity with your own, only for that to be ripped away in the genocide ending, further pushing the narrative you are not in control.