This is X'flare, a small company Vtuber of some singers and artists I believe.
She did a cool song yesterday!
https://www.youtube.com/watch?v=aAA05qwOwDkShe's got a small lore narrative about being on the lookout for her lost sister and has been active since late 2018 with little growth.
I think she is pretty neat and could use some more views, please check her out she is streaming now!
https://www.youtube.com/watch?v=2e_nuzHCYcI