17 Revelations About Fantastic Beasts: The Crimes of Grindelwald, Straight From the Set

Miller had quite a bit to say about the abusive relationship between Grindelwald and Credence, the former of whom takes advantage of the latter in the first film:

"I definitely felt, personally, that a lot of the exploration with Credence revolved around the idea of abuse and some of the different ways that trauma can happen to a young person. I see that in a lot of the exploration of Credence. Something interesting about sort of this idea of light and dark magic, and it's alluded to many times in this series, is that love is a form of light magic, right? And so Grindelwald's manipulation of love, targeting that deficit that he could perceive in Credence, is a form of abuse. You could also say it's a form of dark magic to wield power over that human need."