Anger is a character in Inside Out. He is the red Emotion and one of the five Emotions inside the mind of Riley, along with Joy, Fear, Disgust and Sadness.
Lewis Black describes Anger as follows: "He's angry. He knows the group is well-meaning and they try hard, but they don't get how things should work as well as he does. So he has to stay on top of everything, and the only way he knows how to get their attention, keep it, and make sure they get things done right is by getting angry. He is comfortable with his anger. It makes him happy. But when pushed too far, the top of his head bursts into flames."[1]