They love baby brine shrimp, cheap and easy to hatch. Also live black worm. I think some times they need movement to know its food. I would start with bbs then move to worms then frozen then pellets. That's what I did with my blue star.
The kuiteri wrasses are dope I want one bad they are super similar to the blue star but alittle smaller. There is one dude on r2r that has one and it's beautiful. I like leopards compared to other wrasses they are super peaceful.