“Vtuber” refers to the the virtual persona but also the real person behind the avatar, cf. “Youtuber”, “blogger”. And “avatar” is a much less specific and less

“Vtuber” refers to the the virtual persona but also the real person behind the avatar, cf. “Youtuber”, “blogger”. And “avatar” is a much less specific and less informative term than “vtuber”. And anyway the street finds its own names for things.