For studio, use KKPE > adv.mode > search the head bone (I usually use p_cf_head_bone, this bone is close to FACE). And scale xyz -1

Mod control bone also can do the same thing. But KKPE can save that into scene. Other mod mostly don't save that.

I used to have GameObjectList. That mod can do even in the chara maker. Properly can work at main game too (Never tried. And the interface is hard to use too… I use this before KKPE appeared.)

For that screen I capture. I choose no head and no hair only. Mine is better pack R9… So I don't sure what mod can makes you select no head and no hair.

I don't sure Koikatu has POV hide head mod or not. This happened to HS…