  Relativistic fermions on a lattice are shown to correspond to the
$fluctuations$ in the localized nonrelativistic fermions. Therefore, in
contrast to nonrelativistic case, the relativistic fermions are critical with
universal exponents described by the strong coupling limit of the
nonrelativistic problem. The fluctuations also describe $anisotropic$ spin
chain at the onset to {\it long range magnetic order} whose universality class
is the Ising model. This generalizes the universality in spin models to include
multifractal exponents. Finally, analogous to the nonrelativistic case, the
relativistic fermions may exhibit ballistic character due to correlations.
