Multi-Class & New Guy

Hello,

I poked around but couldn't find an answer to this. You can only get the new character if you're level 5, but how does that work if you're multi-class? Does one of your classes need to be level 5?

I'm torn between a figher/thief and bounty hunter for my evil party playthrough, and this seems like a reasonable tie-breaker. Don't want to wait forever to get my full party together and want the new guy in it.

Thanks!