just put in four damsels for first fish a yellowtail blue, a blue, a humbug (3 black stripe) and a creme color damsel, the humbug seems to be a big bully should i take him out?
If you choose to take any of these back to the store, I would advise you not to replace with a Domino damsel. In my experience (limited!) they are just as bad or worse than the Humbug.
You might consider green chromis, they are inexpensive but more placid. Not as exotic looking, but a good starter fish. Good Luck.