Rinna Inc. is a Japanese AI company that specializes in developing conversational artificial intelligence and digital human solutions. It has collaborated extensively with Digital Human Co., Ltd. to create emotionally expressive virtual characters by combining Rinna’s free-form conversational AI engines with Digital Human’s avatars that feature facial expressions, voice, and audiovisual elements. Their joint efforts include the “Rinna Character Platform,” enabling natural, emotionally rich communication experiences with digital humans across sectors such as customer service, entertainment, and education. Rinna has also worked with partners like Givery and UneeQ to integrate its technology into broader chatbot and avatar ecosystems. Notably, Rinna develops Japanese-language large language models, including Llama-based variants like "Youri 7B" and "Youko 8B," to support highly interactive and localized applications.