In the game I play essentially a ninja who cuts off cultists' heads in a bid to stop the next apocalypse

This one had a less altruistic cause:

Cops hunt sword-waving ninja after robbery bid: Armed culprit flees empty-handed when clerk refuses to hand over cash

Okay, as a gas station attendant, I have to say that if someone came at me with a sword, I'd go ahead and give him the cash, then call the cops with the ninja description after he leaves. Anyone that crazy is dangerous, especially with sharp objects.