Azure Damsel Behaviour

[jostafew]

Hello everyone, I've got an azure damsel (for about 2 months) that's been a bit of a sh** disturber, quarreling with my royal gramma and occasionally my false perc. clown. Everything I read tells me that this guy should be a peacefull fish but it's constantly pestering the other fishes, occasionally causing damage to the gramma or itself (retalliation from the gramma). I'm a little puzzled. There are only 3 fish (and a number of crustaceans) in the 70gal tank, would having more fish like a group of small cardinals for example provide some distraction and alleviate the problem?

Any advice would be appreciated, thanks