Nahad
A Nahad is a Persian name that means 'quiet but ready to punch you in the face.' You don’t mess with a Nahad.
My Nahad neighbor never says a word, but he yelled at the mailman for 5 minutes.
She didn’t talk, but she beat me in the game. No fair!
He just sat there, but when I asked for a drink, he said, 'you’re lucky I didn’t ask for a drink for you.'