  Exotic spinors arise in non-simply connected base manifolds due to the
nonequivalent spinor structure. The dynamics of exotic spinors are endowed with
an additional differential factor. In this work, we merge the exotic spinor
scenario with Cartan's spinor viewpoint, according to which a given spacetime
point is understood as a kind of composition of spinor entries. As a result, we
arrive at a geometrical setup in which the Minkowski metric is perturbed by
elements reflecting the nontrivial topology. Such corrections shall be felt by
any physical system studied with the resulting bilinear form. Within the flat
spacetime context, we investigate quasinormal modes arising from the
interference of nontrivial topology in the scalar field dispersion relation.
