  It is tempting to interpret the minuscule scale of neutrino masses as a
symptom of its radiative origin. In light of the notable leap in precision
expected at the Future Circular Collider, we explore areas of the parameter
space that can simultaneously support the detectable Higgs-strahlung signal
with parallel ones from forthcoming measurements in low-energy observables. We
pinpoint the role that the extra fermions have in shaping a signal distinct
from the pure Inert Doublet one. The details of the full one-loop computation
and on-shell renormalization are presented. Both normal and inverted
hierarchies for the radiatively generated neutrino masses and angles are
investigated.
