Misbehavior is one. Mischevious is acting badly
Please elaborate on your question
I would go with the author points out that the eyes reveal the essential characteristics of a person.
Taylor with his RecMed vending machine. His initial thought was to set up a pop-up shop at the tournaments to sell first-aid kits. He tried it and quickly realized it wasn't the best model. "We noticed that it would cost too much to pay people minimum wage to sit at tournaments for six hours," he said.
