I mean, it's not like she's gonna tell someone she just met, "Hey, wanna hear the stories of how I had to sacrifice some children when I joined my church?"
There are many many ways to put exposition in a fiction creation whether it's a book, a film, or a game, and they have a hierarchy of quality (for example, putting it in visual form is better than in dialogue, dialogue is better than a random book), it all depends on how good a writer you are
