He’s the husband of AMENT, the Underworld hospitality Goddess, and carries the souls of the dead to her in his little papyrus boat.
He dresses in nautical fashion but spends most of his time sleeping at the wheel. Hobnobbing with the dead must have a slumberous effect.
Whenever a soul comes along asking for passage, they have a terrible time trying to wake him up. It’s depressing to realize that public transport is subject to delays even in the afterlife.