are actually quite shy for a wrasse and for the most part quite docile. Once acclimated they will eat just about anything you feed. They are very active throuout the photoperiod searching for pods
and the like. They will flip just about anything not nailed down in search of foods though. Safe with snails but if added first will be a danger to decorative crustacean species. If the wrasse is added after the crustaceans, it will often leave them be as long as the fish is properly fed and there's an ample supply of pods IME
Best time to aquire one is just after the change from juvenille stage and starting it's color transformation to adult stage. They are usually much easier to care for and will be quite long lived. They do however get rather large over time. On that note, you should be wary with the panther grouper. They get quite large and will end up being a concern to all tank mates including outgrowing it's current home.