The excitations in the bare molecular system are characterized in Fig. via the molecular transition dipole matrix, truncated to the lowest six electronic states. Along the diagonal (permanent dipole elements), the character of each transition is labeled, where R (L) indicates a ππ * excitation localized on the long right (short left) arm, and CT indicates a charge transfer state between arms. The NTOs outside the cavity are shown in Fig. for the lowest six molecular excitations. In many photovoltaic or light emission applications, one aims to control the energetic positioning of the charge transfer states with respect to other types of excitations, e.g., ππ * , in order to provide the most beneficial pathway for the excited state population. Here, we showcase the ability to control the energetic alignment and character of a low-energy charge transfer state (CT 1 ) via coupling a higherenergy electronic transition (L) with non-zero oscillator strength to the cavity. Fig. showcases the polaritonic energy as a function of the coupling strength A 0 , where the colorbar indicates the percent of photonic character. Here, the cavity frequency is in resonance with the fifth molecular excitation (L) at ω c = 3.45 eV with cavity polarization in the X-direction (see inset between panels d and e). Further, Fig. shows the excitonic absorption spectra as a function of coupling strength A 0 (see Theoretical Details), where the vertical dotted lines indicate the cavity frequency (right) and the low-energy ψ 1 transition. Above Fig. , the absorption spectrum outside the cavity is shown. To analyze the character of the low-energy CT 1 excitation as a function of the coupling strength A 0 , we compute the (Fig. ) polaritonic NTOs (ζ