Development of a library of intelligent agents for a Virtual Reality application aimed for psychiatric/medical therapists and aid them in studying and eventually treating patients with anxiety disorders. The simulation takes place in a supermarket/grocery store, a typical environment which may cause anxiety and/or fear for patients to be in. The focus of this thesis' work is to create and manage non-human actors: store clients and workers, with special attention on realistic behaviours and animations. Also, because this is part of an ongoing larger project, special attention must be placed on the project's modularity so that it can be easily integrated and/or expanded upon.