Be prepared to answer: why do you want to work here?
Just be yourself. It may sound cliche, but if you are right for the job, you are right for the job. If you aren't, you aren't. As an advisor especially, you will NOT succeed if you don't really want it. It's a GRIND from the get go, and you really have to want it if you think you will get anywhere.
With that being said, if you have what it takes, this will be one of the most rewarding careers of your life. Great pay, atmosphere, and team. They treat their advisors like gold.
Show up on time, research the company, have 2 references pre-coached. If they are interviewing you they are desperate to fill a vacancy.