A 27-year-old man and a 24-year-old woman are reported to have been assaulted in two separate incidents outside a Wellington Street nightclub, at around 2.45am on Friday March 6.
Both suffered minor injuries.
Police believe the woman pictured could have information useful to the ongoing investigation and are urging her, or anyone who recognises her, to get in touch.
Call 101 quoting crime reference number 14/57444/20.
You can also give information to independent charity Crimestoppers anonymously via its website - www.crimestoppers-uk.org - or by calling its UK contact centre on 0800 555 111.