With the developments of science and technology, there are more and more industries utilize the technology of artificial intelligence to design various agents which can communicate with people. However, agents are often gave undue emphasis on the inner program design and industrial technology, for example neglecting external model and appearance for communication. Character design can be applied in very extensive areas, such as novel, drama, movie, animation, caricature, illustration, education, computer, game and many industries that have close relation with character design. This research is aimed at the expression design of agent role design. We design an expression-made method and compare with other ways. This study is expected to provide some questions about role-expression design and research achievements to be the reference of Intelligent Agent role's expression design.