Pluto

Part 1: The Dossier: An At-a-Glance Summary

1)
Pluto is the Roman name for the Greek god Hades. While Marvel's pantheon is primarily referred to as the “Olympians” (a Greek term), they frequently use the Roman names for key characters, including Pluto, Hercules, Neptune, and Venus. This was a common practice in early comics to make the characters more familiar to an American audience.
2)
His first appearance in Thor #127 is part of a larger story arc where Thor must complete a series of trials from Odin to prove his worthiness, which leads him to his first encounter with Hercules and the Olympians.
3)
Pluto's desire to find a queen for his underworld is a recurring theme, mirroring the mythological story of the abduction of Persephone. In the comics, he has attempted to force this role upon Venus, Hippolyta, and even the Asgardian goddess Valkyrie.
4)
In the DC Comics universe, Pluto's direct counterpart is named Hades. The DC version is often depicted as a more direct and fiery antagonist to Wonder Woman, contrasting with Marvel's more scheming and manipulative Pluto.
5)
The question of who has jurisdiction over a specific mortal soul has often led to conflicts between Pluto and other death-related entities. For example, the soul of a Norse warrior who dies in Greece could theoretically be claimed by both Hela and Pluto, leading to divine disputes.
6)
Despite being a “Hell-Lord,” Pluto's realm of Hades is distinct from the Judeo-Christian concept of Hell. In Marvel's cosmology, Hades is primarily the destination for the spirits of the worshippers of the Olympian gods, and is not exclusively a place of punishment, though Pluto runs it as a grim and oppressive kingdom.