Tom Hiddelston on Mia and the truth
Here's what Tom Hiddelston says about working with Mia, from "Crimson Peak - Art of Darkness".
"Edith is intensely good and pure-hearted and innocent, and Mia has those qualities", extols Tom Hiddelston, who also starred with her in "Only Lovers Left Alive". "She is so intelligent and honest and has a very pure spirit. She can be very quiet but she sees everything. Everything she does is authentic. Someone once said that the camera captures the truth, but it also captures falsity. I've never seen Mia do anything that doesn't ring true."
I would add that besides capturing "the truth", Mia is able to take on totally different forms with her characters and be completely authentic while doing it - Jane Eyre, India Stoker, Ava, Sophie, etc.