Dennou Shoujo Siro, or simply Siro, is a virtual YouTuber and the main character of the series Dennou Shoujo Siro. She is depicted as an AI-powered digital girl who interacts with her audience through engaging videos, gameplay, and live streams. Siro is known for her cheerful personality, humor, and a slightly mischievous side, making her highly popular among fans. In the series, she explores various digital worlds and tackles challenges with creativity and wit, often breaking the fourth wall to connect with viewers. Her role is central to the series' narrative, showcasing the blend of technology and entertainment.