It believes fiercely, gets wounded, gets angry. Your Entertainer side is your public persona. The part that gets jazzed up about being in front of people and making them happy. Your Entertainer side is focused outwards. Entertainment is a business service you provide to other people.
Artists create, and Entertainers make money.
Because you need both skills to succeed in today's music business. You have to be able to write incredible songs and produce them flawlessly. You need to give a heart-felt performance on a moment's notice. You need to have solid chops and a groove with your band. All tasks for your Artist side.