Ask about the company: e.g. what type of consulting are they specialized in? How big is the firm? How many employees? What is the culture like?/ What is it like working at the firm?/ Team bonding?/ Office Fridays? What kind of training offers can you expect in your first year? Does the firm have a mentor program? what is the ratio of females in the firm?/ Special programs for women? How many hours is a typical workday? How is a case team picked? How many consultants is the firm expecting to hire this year? - compared to last year.
Ask about individual issues. What can the firm specifically offer you? Employee benefits? Office choice...
Also, try to keep the conversation informal. You do not want binary answers or very short answers. Try to build up a conversation. Drop interesting facts about you/ your candidate profile every now and then to make the talent manager interested in talking to you. Maybe even convinced that you are a good fit.
I hope this helps. Good luck. :)