According to the information about the evil spirit of Douluo, the Yandi Ross hound is a creature with unique habits in Cthulhu mythology. It is a medium-sized sports hound, which originated in Europe and is good at running.

The seven first-class gods of Douro control the seven original sins, namely, the god of greed, the god of laziness, the god of arrogance, the god of jealousy, the god of gluttony, the god of desire and the god of anger.