  It has been recently proven that new types of bulk, local order can ensue due
to frustrated boundary condition, that is, periodic boundary conditions with an
odd number of lattice sites and anti-ferromagnetic interactions. For the
quantum XY chain in zero external fields, the usual antiferromagnetic order has
been found to be replaced either by a mesoscopic ferromagnet or by an
incommensurate AFM order. In this work we examine the resilience of these new
types of orders against a defect that breaks the translational symmetry of the
model. We find that, while a ferromagnetic defect restores the traditional,
staggered order, an AFM one stabilizes the incommensurate order. The robustness
of the frustrated order to certain kinds of defects paves the way for its
experimental observability.
