Kiara is the best English vtuber because she is transracially Japanese.
>Lived in Japan for years
>Respects idol culture
>Has a solid Japanese work ethic, will even work while sick
>Actually cares about doing her job well, prides herself in entertaining others
>Is fluent in Japanese, singlehandedly bridging the gap between two branches
Her natural Austrio-German intelligence combined with her absorption of Japanese culture and the Japanese work ethic has melded her into the perfect Vtuber and entertainer. The only thing holding her back is arguably the fact she's stuck in the EN ghetto, yet she's still insanely successful there. Imagine if she debuted under the JP branch, she'd be unstoppable. But the higherups at Hololive knew they'd need someone on the inside to keep EN afloat eventually, and Kiara plays that role perfectly.
Takanashi Kiara is truly the ultimate Hololive vtuber.