Interestingly, state interaction among the locally excited states have little effects on the exciton states, with identical first and second excitation energies as the two locally excited states. For this excimer structure, the net exciton resonance energy is zero. Super-exchange due to mutual charge transfer does contribute to state stabilization, lowering the first and the second excited state energy by 0.06 and 0.12 eV, respectively. The magnitudes of SE stabilization in these two states are mirrored by the corresponding structural weights for the non-equivalent CT directions, amounting to 2.56% and 0.06% for the BCT (monomer 2 → monomer 1) and FCT states in the first excited state, and 0.02% and 7.54% in the second excited state. Notice the different directions of CT contributions for the two states. Finally, we found that orbital delocalization and configurationspace expansion in TDDFT calculations have little effects on the ground state (not surprisingly)