To classify a universal characteristic, proceed in two stages.
Stage 1: Does it belong to the essence? If so, identify the relevant intrinsic relation: genus, species or differentia.
Stage 2: If it is outside the essence, is it peculiar to one species? If yes, it is a property; if shared across species, a common accident.
Application:
Animal — genus of human.
Rational — differentia of human.
Capable of laughter — property of human.
Walking — common accident relative to human.
One subject can receive predicates of quite different logical kinds.