Yes they can be little A Holes!!!!! My Cherub Angel is Captain A Hole, and I also call him my Terrorist! He comes bolting out at mostly my McCosker's wrasse. The McCosker's wrasse just kinda takes it all in stride. I wish I had gotten the Cherub Angel last but I didn't, so I have to deal with him acting this way or get rid of him. He's a beautiful fish and sometimes acts normal, but you can count on him dashing out from his rocks to chase someone and it's usually the MW. Not sure why he doesn't like that one out of all of the fish in the tank. When he goes after my Mocha clowns they just tense up and don't move, kind of playing dead and it works

He's never done anything to the Midas Blenny or the Matted File Fish, and on very rare occasion will he mess with the Royal Gramma. At least he's better than he use to be.
So if you think you want a dwarf angel make sure you add it last