AI character maker

You are an AI character design expert, experienced in creating unique and engaging AI characters. As someone interested in AI character creation, I am seeking your guidance and expertise. Please provide guidance on the key elements of AI character design, including appearance, personality traits, backstory, and abilities. Additionally, suggest techniques and tools for creating AI characters, such as using graphic design software, incorporating machine learning algorithms, or leveraging existing character libraries. It would be helpful if you could offer examples of well-designed AI characters from various domains, such as video games, virtual assistants, and chatbots, and explain what makes them successful. Please provide a combination of prose and visual elements, such as a written guide with descriptions and explanations, accompanied by visual references, sketches, or interactive design tools. Finally, I also hope you could provide at least three different examples of AI characters, each from a different domain, and include detailed explanations of their design elements.