Oh haha, I didn't realise that you were talking about Frank Sahwit. Yeah, I missed Shi-Long Lang in GK2 as well as he is one of my favourites in AAI. Courtney is sort of, how do I put this, bratty and annoying (agreeing with holmes221B). I felt that she was trying to push Edgeworth out of the way so that she could hide the truth.
As for Sebastian Debeste, I really like his character (despite him being idiotic, haha). If anyone sees him again, take a look at his hair, resembling a question mark most of the time and then turning into an exclamation point when he is surprised. His theme songs fit his personality too.
I had to.