>>2932295>>2932785Yep, should add there's also a HK model in the WSS pack that has very nice HK Haku & HK Ran models. There are also variations of the HK body such as one with much smaller boobs. I think I've seen it used like once almost a decade ago with Alice from Queens blade. Holy fuck I feel old.
>>2933200The point of having inbetween bones is to improve motion comparability. Say you want to make the model breath using the upperbody2 bone, if you put your breathing motion on that, it will conflict w/ whatever motion you slap on top of it but if you do your breath motion on a upperbody2+ bone that moves with upperbody2, your breathing motion will be layered on top of the added motion instead of conflicting over the same bone.
This practice is also great for adjusting arm clipping