The Azure damsels are some of the less aggressive. In a big tank with lots of hiding spaces they tend the guard a small area. They definitely can get a little chippy. That is just part of the deal with them. The blue devil damsels are downright mean and will hurt the other fish. In my experience the Azure damsels just tend to chase away from their area and not attempt to inflict injury on other fish. However, as we know all these fish have their own individual personalities. Definitely a calculated risk putting these guys in. Hopefully they pan out because the blue and yellow looks so great. The blue is absolutely striking under 18 K lighting.