Carey Mulligan is the only person on this planet who holds a 14th dan black belt in bittersweet jitsu. Don’t ask her for a demonstration.

“True martial art is about more than performance,” she’ll sigh, when you inevitably do. “One trains one’s body as a tool of one’s mind. Would you ask me to demonstrate a shovel?” She might look away.

It’s in your best interest not to joke about whether there are higher ranks on other planets.

“You and I will never know,” she’ll say, turning to you with devastating eyes, and a smile like a hook in your heart.