Pluto is the Roman god of the dead and wealth and ruler of the Underworld. His Greek counterpart is Hades. My brother Nico is a son of Hades. We only discovered that there were Roman and Greek camps recently and our camp tried to kill everyone at the Greek camp. I mostly blame Octavian. But then he got himself blown up Same god, different sides of a coin, I guess is the easiest way to explain that. We're more militaristic than the Greek demigods, but we're all taught to fight in some fashion as soon as we get to Camp.