Not Dionysos pure and simple, as Nietzsche believed, but Pentheus was the subject and hero of the primordial tragedy. The suffering Dionysos was at one time called “Pentheus,” the “man of suffering.”
Kerényi argues that Pentheus, not Dionysus, is the original tragic hero, and that the name itself — encoding penthos — marks him as the suffering god’s mortal counterpart and double.
, Dionysos: Archetypal Image of Indestructible Life, 1976thesis