Shirley is one of the background prisoners. We get to know her name when Chrissie Latham and Bea Smith investigates who laged at them after the fire that detroyed Wentworth when all prisoners are at Woodridge. Also previously referred to as Shirley when she helped Bev and Lil bash Doreen (ep. 256) Often referred to by the surname "Clark". She got Bea the treacle for Margo's tar and feathering.
Shirley has a distinctive look with her big 1980s style glasses.