Thanks everyone. She appears to be a female Pseudanthias pleurotaenia as the picture provided by Mr. Majchrzak looks exactly like her.
On a side note: Mr. Majchrzak I'll be moving back to NYC within a month, and was planning a trip to all the famous tanks in NY such as JBNY's, PaulB's etc should they allow it. Any chance I could add your TOTM to the list?