Bazyli is embarassingly young, not only for a vampire but for anything humanoid in general. Perhaps mayflies will accept him as their elder. He's three years old. He has no memory of his mortal life, as it's common for vampires, but he guesses he was either human or half-human judging by his shape. Although he can't consume anything but blood, he enjoys cooking and discovering new recipes. Being so young is dangerous for a vampire, which is why the band hides or lies about his age to protect him.
[Nomusa and Bazyli waiting to be drawn individually]