Ryoga

Ryoga is something of the reocuring protagonist of the story. He is also Joshua Jusenkyou's father.

Ryoga's display's of power and long life(he is known to have existed since the Age of Darkness) make him somewhat of an enigma. Throughout much of the series, he is reffered to as "The Prince of Darkness", and he is known to possess underworld magics and sometimes retreats to a secret fortress on one of the tributaries of the river Styx(He took Joshua there when he kidnapped him). This has led to the conclusion that Ryoga is some sort of demon or underworld deity, he is known to call upon the Dark Lords.

However, in the short story Aspect of Death, it is revealed that Ryoga is one of the last two surviving Iname.