These models/skins are used by the Heather and Yukie NPC options. The right most model in each picture is an outfit option. The middle model shows how the NPC looks if you embrace them. The left model is used if the PC is nosferatu.
Mod supports concept of installable outfit packs. The following outfits are packaged with the mod as examples to showcase the capability. Additional outfit packs can also be installed at a later time. (Hopefully authors will grant me permission to make a few available here).