Charon, The Ferryman.
Charon was the ferryman of Hades.
The ferryman in the Underworld is known as Charon.
Charon, the ferryman of Hades
In the Underworld, realm of Hades.
Charon.
For more or less the same reason Hades himself was: it was his job. If there's a river that you can't ford or swim across, there has to be a ferryman. Charon was that ferryman.
First, you die. Then you have to cross the River Styx, with the ferryman, Charon.
Charon the ferryman transported the recently deceased across the River Styx to Hades.
Dead people and spirits, hades and persephone, the river styx, and charon the ferryman.
you need to present a coin to the ferryman as payment for passage into the underworld.
By paying coins to Charon the ferryman of the dead, to ferry you across the river Styx.