Kobo Kanaeru, Vestia Zeta and Kaela Kovalskia are female Virtual YouTubers associated with hololive, debuting as part of it's third generation of VTubers.

Kobo's an adult who acts like brat, childish girl that claimed herself to be Demon Lord and also Princess, loves to swear words and joking around with her viewers. Sings pretty well
Zeta's a mysterious 7th recruit of The Secret Archive Unit. Not a cat.
Kaela Claims to be an idol but actually a comedian. Likes to flex.