Mr. Utterson stepped out and touched him on the shoulder as he passed. “Mr. Hyde, I think?” Mr. Hyde shrank back with a hissing intake of the breath. But his fear was only momentary; and though he did not look the lawyer in the face, he answered coolly enough: “That is my name. What do you want?”
“I see you are going in,” returned the lawyer. “I am an old friend of Dr. Jekyll’s—Mr. Utterson of Gaunt Street . . .”
–The Strange Case of Dr. Jekyll and Mr. Hyde,
Robert Louis Stevenson
Which detail characterizes Mr. Hyde indirectly?

What conclusion can be drawn about Mr. Hyde?