Hi, I got a Jones Day interview, so I thought I'd share my approach.
I listed 3 qualities that I thought would be necessary as a Jones Day trainee - some things were generic, like analytical skills, as every trainee at any firm will need that, but some were more tailored. For instance, Jones Day has a non-rotational TC, so you need to take initiative more. I then discussed 1 experience per quality, explaining briefly what I did and how I demonstrated that particular quality. I then linked back to Jones Day at the end, and why I would need those particular qualities at that firm - eg. Jones Day's non-rotational TC means I need to take initiative, and my resourcefulness will help me add value to the firm.
Hope that makes sense, feel free to DM with any questions you may have!