I did a lot of Agile in my McK times, precisely working iwth the specialists from McK Digital Labs in Berlin -most likely, they are exactly what you are interviewing for-.
Your interviews will be agile-based, but for sure you will have a strong FIT part -SURE SURE SURE, since they need to ensure that you fit into the consulting world-.
Assuming the Agile part you have under control but probably you are quite new to the FIT part, the "Integrated FIT guide for MBB" has been recently published in PrepLounge´s shop (https://www.preplounge.com/en/shop/tests-2/integrated-fit-guide-for-mbb-34)
It provides an end-to-end preparation for all three MBB interviews, tackling each firms particularities and combining key concepts review and a hands-on methodology. Following the book, the candidate will prepare his/her stories by practicing with over 50 real questions and leveraging special frameworks and worksheets that guide step-by-step, developed by the author and her experience as a Master in Management professor and coach. Finally, as further guidance, the guide encompasses over 20 examples from real candidates.
Furthermore, you can find 3 free cases in the PrepL case regarding FIT preparation:
Feel free to PM me for disccount codes for the Integrated FIT Guide, since we still have some left from the launch!
Best and happy holidays,