Ari is a three letter job description for an entourage role. ARI is short for assistant, which is a person who helps another person with their daily tasks. An assistant can be employed in many different fields, such as business, entertainment, and healthcare. In the entertainment industry, an assistant is often referred to as an entourage role. An entourage role is responsible for helping the main talent with their needs, such as scheduling, transportation, and other tasks.