NGL, thinking on the setting it becomes more obvious that this is a society that would value women over men. Their strongest military force the Heroes is also completely dominated by women. So why wouldn't their society's equivalent of the underworld also be populated by women.
The only tropes missing are male oppression, males holding the majority of the support/non-combatant roles, and the inclusion of weak effeminate males to complete the typical to the role reversal setting.