just remember, all the origin characters are the main character that we are role playing. You simply can't have plot twists with YOUR own character. it wouldn't make any sense at all. Unfortunately, Larian has written themselves into a corner here, what you see is basically what you get.
As a player you won't know more of the plot than what the game reveals to you, even if you happen to play an origin character. Take Gale for example: he tells you he was the lover of a goddes and he might believe it to be true, but in this world of powerful magical beings, what does it mean? It could be something else masquarading, he would not know.
It's not that different from a detective story where at the end you learn it was the narrator telling the story who "did it".
