You know it's funny, but those Pajama Cardinals always attract attention from visitors. I always get "I like those fish with the spots." Meanwhile, though I like them or wouldn't have purchased them, they're not the most colorful fish in the tank.
I actually got them because I thought they'd school, but they generally find their own individual coral to hang under or around.
I'm sure you want the chromis for the same reason, but unfortunately you'll probably end up with one after a while. I did and it seems to be the norm unless you have a huge tank and can put a dozen or so in. I think there's quite a few threads on the subject.