The mono-and diheteroaromatics of Figure were analyzed separately. We primarily explored their lowest triplet n,* state ( 3 n,*) as this allows us to use a larger portfolio of aromaticity descriptors. Yet, we also calculated several compounds in their singlet n,* states ( 1 n,*) to probe if trends are the same for singlet and triplet n,* states. Emphasis is placed on electronic aromaticity indices as these are readily separated into and -components, although the spinseparate magnetically induced current densities (MICDs) were also analyzed. For electronic indices, we computed (spin-separated) multicenter indices (MCI) and electron density of delocalized bonds (EDDB), with focus on results from MCI known to provide the most accurate predictions in a series of aromaticity tests. We further computed nucleus independent chemical shifts (NICS) for the 3 n,* states, although not spin-separated (see the Computational Details of the SI). Thereby, the NICS values cannot explain the cause of the (anti)aromatic character of an n,* state as the magnitudes of the individual spin-components are unknown. For some 3 n,* states, we also analyzed geometry-based parameters and the relaxation energies when going from the vertically excited to the relaxed 3 n,* states: Do they reflect the drive to relieve antiaromaticity of the -component or the strive of the component to retain aromaticity? The analysis of this tug-of-war (Figure ) is done jointly on the mono-and diheteroaromatic compounds in a final section on generalizations.