So during Force Friday II the new Phasma novel came out. I don't want to give out any spoilers but there is a new character named Captain Cardinal. He is a captain in the First Order much like Phasma, however he is in charge of training and conditioning the younger recruits while Phasma is in charge of teenagers through regular troopers.
Here he is on the special Barnes and Noble edition poster that came with the book.
And here he is with a helmet on appearin