Got to meet with a PwC partner and director in a back to back interview. Overall, my recommendation would be to show personality. They know that everyone who's made it to the interview round is smart and qualified, What helped me was being relatable and showing them that I'm someone they want to work with. Make sure to work on your elevator pitch for when they ask you to tell them about yourself. I included some minor details about myself/interest outside the office and we ended up spending a good chunk of time talking about how we have this in common and our experiences. Come prepared! Before my interview I had a running doc where I composed a list of different questions they might asked based on what I've seen online through reddit/glassdoor/ fishbowl. The turn around time was very quick, I heard back with a job offer within a few hours.