Just read this, but I have something similer with a damsel (yes i know a bad idea!) but it's pretty and seems to keep to himself but does have a nasty strick every so often and have had major issue with new fish, it just wont leave them alone long enough to settle, I have a big tank and understocked I think thats the major problem.
After watching reefvideos I noted a guy using a shaving mirror when adding fish, and it works too, my damsel beats the glass not the new fish, after a few days things calm down and i remove the mirror.
Just an idea for next time