Someone will figure out who that young lady is.
I don't think they will. Again, she was an extra. She had no lines, and was just there to fill out the group. Extras' names usually don't get recorded for posterity. That's why we still don't know who really played Isis.
And I don't think there's anything sexist about finding someone attractive. It's a natural part of human interaction. It's only sexist if you ignore the rest of their attributes.