Novel readers : Will we learn more about master Wateva/Anyting ? Face reveal even?

yes will find out if it is a man or a woman and there should be a face reveal but not 100% sure if they will actually show it

How many chapters later is that gonna be?

so finding the gender around 80 chapters maybe was after 50th floor a breather arc. for the face they may show it here or later quite sure near the end of the novel the face should be present