That's just Olga dreaming, check her crossed bangs are the same and you have a couple other shots like in the very first page of her without her side braid when she's not on her daily clothes but on pajamas (presumably she undoes the braid to go to sleep 'cause why whould she want to sleep with that on). The very follow up page to the one you posted has this same person waking up and saying "No, this isn't a dream. I came to Chaldea as the new Director. As Father's replacement..." and the design is clearly Olga.
The real question from that chapter is was Olga lily a product of adult Olga's delusion and mental collapse or the Alien God watching her all along?