One of the most important things is to use for the full experience (but not necessary):

https://civarchive.com/models/45448/full-feature-character-prompts-fantasy with their corresponding Loras/LyCORIS/Textuals inversions mentioned in their section

And another strong recomendation to use is ADetailer with face_yolov8n:

https://huggingface.co/Bingsu/adetailer

Check also my other merge: Xtremix Ultimate Merge