Advice - Final Round with Someone Very Senior and Somewhat Junior

Hey guys, 

Have a final round early next week, met with the two more junior people I’d work with day to day and discussed my background, interest, walked through a deal. Got through to the final round with someone very senior (think CIO) and an associate. Assuming this will be mostly fit? I’m confused because in the past senior interviews at the end have been more talking about background, me asking about their background, gearing interesting deals they’ve worked on one on one. This is with a more junior person but I guess still fit, ask about the role, company etc that I did in the last round? Confused on what questions to ask and what to prep for.