@@Manakuuchiha not only facial rigging, he also has to be very expressive in the right way at the right time, which is way harder than it sounds. As Bao once explained, a greatly rigged model can perform horribly if the person using it is not expressive. So yes, props to the rigger but also to Betsy's ability in using it to its full potential (he also uses facial toggles a lot).
I haven't watch that stream but can anyone tell me why Bettel there just stared silently, kinda eerie, when he usually super freaked out when someone was on fire.