Kroger was a great company to work for to gain experience as an intern. Generally, they are well staffed with adequate pharmacists and technicians, and this allows the intern to focus more on developing clinical skills, as opposed to simply acting as a glorified technician. When interviewing, Kroger wants to hire someone that will treat their patients well, that has a desire to learn, that is willing to do whatever is needed to work as a team, and that is passionate about pharmacy. Discussing your experience in pharmacy, showing good communication skills, and talking about your ability to work as a member of a team are all very important to Kroger.
I actually was able to transfer from a pharmacy lead tech position to a pharmacy intern position with Kroger. So, I did not have to go through a formal interview process. When I moved from Arizona to Tennessee and was looking for a Kroger to transfer to, I just looked in the area where I was living and just asked the pharmacist if they needed an intern. Kroger seems to always need the help so if they can get an intern at their store then they will want you.
It is important to dress the part of a pharmacy intern. Dress pants, a dress shirt, and possibly your white coat to make yourself appear professional and someone that is responsible enough for the job. Most pharmacists will understand that you are nervous and will overlook some mistakes you make in the interview. However, you should prepare by writing hypothetical questions and writing answers so that you may have answers in your head when you're asked in the interview.