There is a common misconception that people with histrionic personality disorder (HPD) are always happy and outgoing. In reality, people with HPD can be just as likely to experience anger and other negative emotions as anyone else.
It is important to understand that people with HPD are not always aware of their own emotions. This can lead to them acting in ways that are out of step with how they are actually feeling. For example, someone with HPD may put on a happy face even when they are feeling angry or upset.
This lack of awareness can also make it difficult for people with HPD to manage their emotions in a healthy way. They may have difficulty expressing their anger in a constructive way or may resort to attention-seeking behaviors when they are feeling upset.
If you think you may be angry with someone with HPD, it is important to try to understand their perspective and to communicate calmly and directly. It may also be helpful to seek professional help to learn how to manage your own emotions and to support the person with HPD in managing theirs.