Isabelle "Izzy" Hartley is a minor character in Agents of S.H.I.E.L.D. She was a longtime S.H.I.E.L.D. agent. Despite the heavy casualties S.H.I.E.L.D. took during HYDRA's attack on the agency, she stayed loyal to her oath and continued her service in the remains of S.H.I.E.L.D. under Robert Gonzales.