The Blue Face is still doing great. Eats like crazy and comes up to the front when someone walks up to the tank now.
I found someone on Craigslist selling a a Yellow Tang and decided to grab that yesterday. It was in a 15g nano and the guy realized that it was too small. I added it into my QT/Holding tank yesterday. It immediately went over to the Angel and they started sizing each other up. Both do not appear to back down, taking equal time to confront one another. I am going to have to keep an eye on that relationship over the next few weeks.