The Attendants
On Snoke’s page in the TLJ visual dictionary, there is a picture of a tall creature draped in a deep purple robe. You can see nothing but the robe and two glowing circles where their eyes should be, and very faintly, a buggy-looking face. I don’t recall seeing them or hearing about them in the film, so either it’s from deleted material or it’s just fun information for the dictionary. Wookieepedia says they were considered for TFA and Rogue One, …