Thank you for your responses.
Yes, I realize that my appearance will have no bearing on how NPCs will react to me, and yes, I realize my character does not show up in combat. That's not why I want the demoness mod.
I want the mod because A) I prefer the aesthetic of playing as a different model to keep things fresh, and B) I want a sample of a mod that does something I'm specifically interested in so that I can use it as a template to grasp the concept of modding. I do not know how to change the model, texture and possibly atom files. I learn best by tinkering with something and seeing how changes that I make alter the outcome, not by reading directions. I'm sure there are other people here who learn the same way.
So, the question still remains: Can anyone tell me where the demoness mod that is referenced
here is? Or any mod that alters the adventure mode player model?