Who would have thought that the gods of Mt. Olympus looked different before? You see, back when the world was new, the first olympians were deities of unknown potential. Before the fall of the Titans, they were immortal beings of undiscovered power. A youthful sorts that still needed to find and dedicate themselves in roles of devine status.
One of those olympians was Hades, the eldest of the brothers' Zeus and Poseidon. Hades was a curious yet composed god. He has always been fascinated of the world around him, finding himself in situations some unfortunate, but his intellect has always been his strong suit. With not yet a purpose, he mingles with other gods, yet is intruiged down on the empty lands of the mortal world.
His residence on Mt. Olympus was short-lived however. When the mortals came and the roles of the gods progressed. Zeus, the ruler of the gods, assigned his brother to the underworld, where he will take over the souls of the departed. Hades accepted his position with no objection, took his part as the ruler of the kingdom of the dead and carried on his duties. Nevertheless, he became cold and stern, and held all of his subjects equally accountable to his laws. With the amount of responsibilities he had, his patience became thin and hot-tempered, and has caused his inscrutable nature.
There's this period of time where his reputation as the god of the underworld was still. He continued his role and nothing was heard from him. Until the day he came back and revealed himself. His appearance has changed, replacing his locks were blues of fire so hot it affected his body. Eyes sunken from exhaustion, and sharp features replaced his once smooth image. Confused and tensed, he seeked for his brother Zeus on Mt. Olympus. There, they were aided by Hephaestus, the god of fire. They found that in some certainty, Hades' body adjusted to the extremities of the underworld. And so with nothing else to do, He returned to his domain.
Here Hades felt no resentment from the other gods, Simply accepting that this is what it meant when ruling a realm so different from others.
As time went on, Hades became discontent with his role. He slowly noticed that the people above never acknowledges him. He was never admired nor praised for his work, he was treated unlike any other gods on Mt. Olympus. For what reasons? Perhaps it was his association with the underworld that made him seem as an unpleasant god. Maybe the name "Hades" itself was so frightening to the mortals that they refused to call out for him, to make temples and sacrifices on his behalf. After all, what could you pray for from the god of the dead? This affected Hades and left a sour taste, so much so that his very nature evolved into what lies in his world, cruel, dark, and dull. He became as uncouth as his subjects and as ruthless as tartarus itself. With this reputation he became a fearsome figure and was feared and loathed, not just by the humans, but by his fellow gods and goddesses.
But by his reasons, there was something else that caused this change of behavior that others didn't knew. Something that was important to him, or someone.
Sooo... The idea I had was that some of the olympian gods weren't the same from when they were younger. Especially Hades. So I ended up making up this origin of him, how he was and looked before. I wanted to integrate the true Greek mythology but still basing this off of Disney's version, but with inspirations from the real mythology.