I have had my group for three years and they are still a bit skittish at times. Walk past the tank and they bang around. These are 7-11 inch fish. Other times they are puppy dogs waiting to be fed.
I noticed in one of the pictures that there appears to be some posturing with some gills flaring. I only see that usually with females on females or males sparing for dominance with other males.
Keep doing your normal feeding and maintenance, and keep an eye out for bullying. She will eat eventually. If you do feed frozen brine periodically I would give that a try as well, as it's crack to small and juvenile cyphos.
Another thing to try would be to re-scape the tank minimizing hinding spots and see if that will get her in the open and reset the heirachy.
I noticed in one of the pictures that there appears to be some posturing with some gills flaring. I only see that usually with females on females or males sparing for dominance with other males.
Keep doing your normal feeding and maintenance, and keep an eye out for bullying. She will eat eventually. If you do feed frozen brine periodically I would give that a try as well, as it's crack to small and juvenile cyphos.
Another thing to try would be to re-scape the tank minimizing hinding spots and see if that will get her in the open and reset the heirachy.