Be prepared. Go to a branch and do your own mystery shop
The system has changed since I joined the company and now it is a lot of difference. But be confident and honest. Customer service focused.
Research there principles and main focuses as a busisness.
Have some banking knowledge
Clean cut conservative
I usually come to an interview bringing in my knowledge/experience and what I can offer to the team. I think being honest and straight forward is the key to a successful conversation.