Kizuna AI plays games, cooks, and even answers her viewers' questions. She sings, too, moonlighting as a pop star with millions of views on her music video. Kizuna AI is like any other influencer on YouTube, except she's not real. But it's not strictly accurate to say she's a standalone, completely digital entity born from the chaos of the internet. Kizuna AI is voiced by a human actress and produced by a character designer, 3D modeler, and an anonymous team.

Kizuna Ai, the most popular streamer in Japan, is an anatomically exaggerated, perpetually adolescent girl in frilly thigh-high socks and a pink hair ribbon. She's also an entirely virtual character, given life by the actions and voice of an invisible actress. In the home of anime and "Ghost in the Shell" futurism, millions now follow Kizuna Ai online, and that success has spawned thousands of copycat acts and a cottage industry catering to so-called virtual YouTubers, or VTubers. Defying the Western streamer blueprint of young male gamers like PewDiePie and Ninja, Japan has invented a new class of streaming star that's equal parts digital avatar and interactive anime. "What separates VTubers from regular anime characters is that you can believe they actually exist," said Takeshi Osaka, founder of Activ8 Inc., the Tokyo-based company behind Kizuna Ai. "That presence is an important part of what makes them so appealing."

YouTube erected a platform where commoners could climb the ladder to stardom. Now, the video-sharing giant is seeing another wave of new talent diving into a glittering entertainment scene. These entertainers are called "virtual YouTubers," or "VTubers," and are represented by digital avatars that look like anime characters. Almost exclusively a Japanese phenomenon, at least so far, these virtual talents have proliferated rapidly over the past several months and people in the industry, together with observers, predict the movement will only accelerate. Following are some questions and answers about virtual YouTubers.