To deeply explore the evolution of artistic creation from computationally synthesized virtual characters to AI?driven human?machine co?creation models, this paper examines the application process of AI technology in visual and performing arts. Through case studies and theoretical discussions, the paper highlights the transformation of AI from an auxiliary tool to a co?creation entity. Through a detailed analysis of the artistic creation processes driven by AI in constructing virtual characters, as well as the pathways of human?machine co?creation, the study reveals the following points: the continuous advancement of AI technology significantly enhances the expressiveness of virtual characters, revolutionizing the content generation models of artistic creation and injecting numerous innovative elements that enrich the immersive experience. Nevertheless, this process also raises ethical and identity?related issues, such as the ambiguity of responsibilities in virtual character behavior, which could lead to emotional dependence among audiences. In the future, virtual characters are likely to play an increasingly important role in cross?cultural communication. The deep integration of AI with arts will continue to drive the development of virtuality and reality through multi?cultural experiential innovation.