As a Monroe Family member, Fiona wears a black blazer over a light-coloured shirt, pants and white ladies' office shoes. She has straight, side-parted hair and ring earrings.
She appears to be a caring and bubbly person.
Fiona and her partner, Dominic, and other Monroe Family members are caught up in a battle against Spas. All the other members except Dominic and Fiona are defeated, at this point, Fiona's left foot has been sliced off. Crippled, she attempts to shoot Spas with her pistol - who dodges it. Dominic lunges at Spas with his kukri, only to be sliced into half with Fiona as she tries to block Spas' wire attack at Dominic, by running between them and shielding him. The two are forced against the wall, Fiona's corpse is left clutched in Dominic's arms as he dies.
She has been seen to be quite proficient with using a pistol.