Pardon my round-eyed white idiot weeaboo indulgence, but your Present Author has been sent on a mission by the Editors That Be to explore vTubers(Virtual YouTubers, Japanese: Vユーチューバー, バーチャルユーチューバー). This is 21st century living at its most stereotyped: whole subcultures emerge and gain millions of followers within a couple of years, without most of the world quite knowing they exist.  But I'm a techie and media geek first, so even I can appreciate that there's something happening here. We all…