nehaberlan

You're welcome.

There is a tool to copy/paste the original/vanilla NPCs' faces. NPC Nif Merge. https://www.nexusmods.com/skyrim/mods/40494? You just need to find the original Serena's head meshes and textures. Because NPC Nif Merge is for Skyrim LE, you need to convert the nif/texture files from SE version to LE. For that reason, you probably need such tools like Cathedral Assets Optimizer, and/or SSE NIF Optimizer. If you don't know how to find an NPC's head meshes/textures, google it. If you don't know how to use Cathedral Assets Optimizer/SSE NIF Optimizer, google for tutorials.

I always suggest to make a "Clean Save". If you have a "save" that has no problem, with main/required mods, and working properly shouldn't cause any problem while you run Cozy Inn. If you have corrupted/unstable mods, and/or bad saves, Cozy Inn might not work from the beginning. So, be careful. First, be sure that you have a working, (not causing any trouble, not crashing...) save. You can try to use that one. If you concern about achieved levels, you can download and use a "Save Game". Something like: https://www.nexusmods.com/skyrimspecialedition/mods/110885

Nice joke...

I know nothing about Ceraph follower. I don't know how it works. You may ask/request EvilReFlex to create TS Followers with TNG add-on. He knows better. My knowledge is very limited. I can't do what you ask for. Please, do not request such a similar thing from me. I don't do anything about modding anymore.

I'm not familiar with TNG. It's not easy to create a new kind schlong with its specific settings. Someone, who is very experienced can do such thing. Sorry. I can't do that.

What is "TNG"? If you mean "The New Gentleman", it's a man body. Why do I make a male version of a transsexual based mod? The answer is "No. I don't."

I don't understand what you mean. I like this body shape. UNPB. I don't want/think to replace it at all. What do you mean by saying "her trap in Pon Farr"? It's a story. What is "b7t"? I have no clue. What "magic"? What are you talking about? Everything in it works fine. All the bugs have been corrected. If you did everything correctly during the installation, you should not get any problem.