In Roman mythology, who is the god of the underworld?

In Roman mythology, Pluto is understood as the god of the underworld, which aligns closely with his Greek counterpart, Hades. As the ruler of the underworld, Pluto presides over the realm of the dead and governs the souls of those who have passed away. He is associated not only with death but also with wealth, as the minerals and precious metals found underground are considered his domain. This duality of representing both the underworld and the riches hidden within it is a significant aspect of his character.

The other figures mentioned have distinct roles that do not relate to the underworld. Mercury serves as the messenger of the gods and is often associated with commerce and communication. Vulcan is the god of fire and craftsmanship, particularly known for his forge and for being the blacksmith of the gods. Neptune, on the other hand, is the god of the sea and horses, ruling over water bodies rather than the underworld. Each of these gods has their own unique attributes and domains, making Pluto the singular figure associated with the realm of the dead in Roman mythology.