  Several extensions of the Standard Model have light doubly-charged Higgs
bosons in their particle spectrum. The supersymmetric versions of these models
introduce fermionic superpartners of these doubly-charged Higgs bosons, the
Higgsinos, which also remain light. In this work we analyze a new collider
signal resulting from the pair production and decay of a light doubly-charged
Higgsino to an even lighter doubly-charged Higgs boson. We focus on the minimal
left-right supersymmetric model with automatic R-parity conservation, which
predicts such a light doubly-charged Higgs boson and its Higgsino partner at
the TeV scale, which are singlets of SU(2)_L. We investigate the distinctive
signatures of these particles with four leptons and missing transverse energy
in the final state at the Large Hadron Collider and show that the discovery
reach for both particles can be increased in this channel.
