(Credit goes to LaViel for finding this solution for SSE, give him a kudos if it worked for you!)' This regenerates her new facegen data the next time you load this save and should update her appearance and fix the black face bug. Then go to ChangeForms -> NPC, delete it and save.
Follow these simple steps to solve this: Download and unpack Fallrim Tools (), Open ReSave.exe, load your savegame, search for '002b6c' (her baseID).
(1) 'If none of the above helps and you had already encountered Serana before installing this mod or had a different visual overhaul for her, her facegen data is baked into your savegame, which can also lead to the black face bug. So I used this technique found on Seranaholic mod page : I got the black face problem with Serana (and I'm using Seranaholic mod), and she was not having the proper face model according to my mods. But maybe it'll give you some ideas for yours : I'm not sure if my message will be useful, since I'm not sure of what made it work for me, and also because it was not the exact same problem I solved.