  Ghost-spins, 2-level spin-like variables with indefinite norm have been
studied in previous work. Here we explore various $N$-level generalizations of
ghost-spins. First we discuss a flavoured generalization comprising $N$ copies
of the ghost-spin system, as well as certain ghost-spin chains which in the
continuum limit lead to 2-dim $bc$-ghost CFTs with $O(N)$ flavour symmetry.
Then we explore a symplectic generalization that involves antisymmetric inner
products, and finally a ghost-spin system exhibiting $N$ irreducible levels. We
also study entanglement properties. In all these cases, we show the existence
of positive norm "correlated ghost-spin" states in two copies of ghost-spin
ensembles obtained by entangling identical ghost-spins from each copy: these
exhibit positive entanglement entropy.
