Feeding my Bicolor Angel

I've had a beautiful bicolor angel for a few days now. she (i like to think of it as a she. lol) seems very lively and swims all around the tank, but when I walk up to the tank to feed she gets very shy and hides until I walk away. so my other fish eat all the food. I've have noticed her nibbling at the live rock here and there. what should I feed to get her to come out and eat? I've tried frozen mysis shrimp, couple different flake foods, and some blue zoo mix.
also since they are omnivores, should I try something like nori for her to eat?

 

yea, nori will work, but if it is grazi8g lr not really

 

you can rubber band nori to the rocks so she will graze on that.