Nathalia "Tigress" Barreto or simply Nat is a former female MMA and Muay Thai fighter who turned to a life of crime and became part of the ISG organization. Despite her criminal past, Nat receives unexpected attention from fans due to her actions against Jorge "Lobão" Lobo, Luis, and Heideguer, whom she killed on the orders of ISG while the trio were already imprisoned at the time. She originates from Rio de Janeiro but works internationally as an ISG operative. Unlike many near pure evil criminals in the group, Nat doesn't kill people for no reason, only when necessary for her missions or personal causes.