  Recently, Zhang-Rice triplet to singlet excitations have been measured
experimentally and verified numerically in a van der Waals antiferromagnet
NiPS\textsubscript{3}, which reveals a collective local change of an electronic
structure. In particular, such numerical simulations predicted that these
electronic excitations occur simultaneously with local electric polarizations.
In this study, we uncover the microscopic origin of this local electric
polarization in the Zhang-Rice triplet to singlet excitation. Our lattice-model
calculation predicts that the electric polarization can be controlled by
applied magnetic fields, where the atomic spin-orbit coupling plays an
important role. We speculate emergence of real space Berry curvature to
describe the electric polarization in this strongly correlated system.
