In this talk, the low-energy quantum transport properties of the Coulomb-
Majorana junction will be discussed, where several helical nanowires are
coupled to a joint mesoscopic superconductor with finite charging energy. By
virtue of the proximity effect, Majorana bound states are formed near the ends
of the superconducting wire parts, which are coupled together by charging
effects. For sufficiently weak but finite charging energy, this system
generically approaches an isotropic SO(M) Kondo fixed point with non-Fermi
liquid behavior observable in quantum transport observables such as the
temperature-dependent conductance tensor or the fluctuating current noise
correlator. The latter quantities follow from the Keldysh formulation of an
effective phase action approach.