When describing a person in a paragraph, focus on their appearance, personality, habits, and behavior. Include their physical features, clothing, body language, mannerisms, how they speak, and emotions. You want to create an image that will last in your reader’s minds.  You don’t have to use them all so don’t overthink it.  Recall the example I gave earlier in my high school paper.  I described my character’s appearance more than anything.  I didn’t go into much detail about his mannerisms and emotions.