So, going by the theories
Protagonist - You are William Aftonon’
William Afton = Purple Guy
Ennard = William afton = Purple guy
This would mean, that William Afton is dead, meaning he has been dead prior to the events of Five Nights at Freddy’s “Flashback mini-games” (you only live once) and that What was in “Spring Trap” is Ennard, whom is in Afton’s body.
Which again, would explain how Purple Guy is still alive, and possibly not a ghost.
What if we take this to the next step? Perhaps, Afton was never the purple guy at all, perhaps It was all Ennard.
Since the first killings, It was all Ennard, that Ennard is literally the Purple guy.
If we go by this, the timeline would be.
Five Nights 4
Sister Location (Around this time, World happens and the other creator dies)
Five Nights 2
Five Nights 1
Five Nights 3
I mean, we assume that Purple guy is a human…but what if not? Perhaps all this time, it was Animatronics vs Animatronics, The spirits of the Children vs AI that became too real for their own good.
“Don’t blame the purple guy, you don’t know what we have been through”