I’m playing Gal Guardians

I don’t understand how seriously I’m supposed to take this. The demons’ leader consistently refers to her actions as a “prank,” and treats the protagonists as a harmless nuisance ruining her fun. Then the protagonists dismember every demon in their way, and they act as if the trapped humans are in serious danger from the demons. Do demons actually die when killed, or do they just go back to Hell? Do demons not get that humans stay dead, so their “pranks” become deadly by accident? Alternatively, does the demons’ leader just give no shits about anyone’s lives?

(Am I thinking too deeply about a fucking Gal Gun spinoff? I thought this was an original IP until 50% of the way through, when the characters suddenly started talking about gathering schoolgirls’ underwear to enhance “pheromone power.”)