A man was sitting with his feet up on a desk. He turned his head when Stanley and the guard entered, but otherwise didn't move. Even though he was inside, he wore sunglasses and a cowboy hat. . . .

. . . "My name is Mr. Sir," he said. "Whenever you speak to me you must call me by my name, is that clear?"

—Holes,
Louis Sachar

What does this description suggest about Mr. Sir’s character traits?

He is hardworking.
He is shy.
He is strict.
He is friendly.