Desha is the King of the Underworld, ranking as 2nd in the Ranking of Kings. He is the older brother of both Despa and Ouken.
Later, it's been revealed that he becomes the 1st king in the ranking.
Desha is a jaded, disinterested man who enjoys novelty. After meeting Bojji and Kage by chance, the only reason he allowed them to speak with him was to relieve his own boredom. In spite of his attitude Desha is an extremely powerful king, ranked 2nd in the world. He is also shown to be very beloved by his subjects, to which he is a fair and reasonable ruler.
He has a sour relationship with his younger brother, Despa, supposedly due to his envy of Despa's good looks (according to Despa). However, this lack of camaraderie doesn't prevent the two from working together in serious situations.
Desha is a Demigod, or a God-human hybrid. He inherited most of his father's power, which manifests in him as extremely powerful magic, strength, and intuition. Like other magic-users he is also able to sense other beings' magic, including Miranjo's portal to the Underworld.
