>>78101346That's because secondary riggers usually use the base rig for when they are asked to rig a new outfit for someone. In Kronii's outfit, they're working with Keffiy's rigging.
However, Kiara's now outfit had to be rigged from scratch basically, save for the facial features, because it has a new stance compared to her default outfit. This is the first time this rigger has rigged breasts in Hololive.
