Moreover, as highlighted by Choi et al., each type of polyelectrolyte (PE) chain exhibits a unique response to external stimuli, making it challenging to predict their behavior using a single theoretical framework. Consequently, each class of PE brushes presents a distinct set of challenges for these systems, as they can exhibit a wide range of physical phenomena. In all of our previous studies, the effect of the applied electric field has primarily been studied on the response of the anionic brushes and the resulting ion and fluid dynamics in nanochannels grafted with such brushes. In this paper, we use all-atom MD simulations for capturing the brush response and the response of the brush-supported counterions and water molecules for the case where cationic ([Poly(2-(Methacryloyloxy)Ethyl) Trimethylammonium Chloride]) (PMETAC) brushes are grafted on the inner walls of a nanochannel. We chose PMETAC brushes as the representative cationic brushes given that they are among the most widely-studied cationic brushes and also the fact that such PMETAC brushes have been grafted inside nanopores for controlling molecular transport. The central result of this study is that we find a significantly large non-linear increase in the EOS flow strength and EOS volume rate: for example, a two-fold increase in the electric field strength leads to a multiple-fold (more than twofold) increase in the EOS flow strength and volume flow rate. We identify that in the presence of significantly high electric field strengths, there occurs a localization of the counterions in the brush-bulk interface region, enforcing these counterions to have a very large velocity, which in turn drives the water molecules (hydrating the counterions) to experience a very high velocity leading to the non-linearly augmented EOS flow. Such localization of the counterions, which implies that the counterions come out from the brush interior but do not completely leave the brush, is caused by the electric field-driven tilting-bending induced brush deformation that enforces a part of the grafted PE chain to be aligned parallel to the grafting surface and the counterions remaining in the vicinity with this wall-aligned segment. A closer look reveals that such deformation of the PE brushes occurs in a direction that is anti-electrophoretic; in other words, the positively charged PE brushes get inclined against the direction of the applied field. The large Cl -counterion velocities against the electric field and their electrostatic association with the {N(CH3)3} + functional group of the PMETAC chains enforce this anti-electrophoretic response of the brushes, eventually resulting in the ion localization and enhanced EOS transport. In addition to demonstrating the possibility of enhancing nanofluidic liquid flows non-linearly, this study, therefore, also points to a most amazing and unprecedented anti-electrophoretic scenario, where a positively (negatively) charged moiety can be made to displace towards the positive (negative) electrode inside an electrolyte. Furthermore, this study is the first study to demonstrate the importance of considering counterion mobility when predicting the brush structure: such considerations will open up the possibilities of non-intuitive brush configuration and lead to the emergence of novel mechanisms for flow enhancement.