Who is the devil Junyi?

The voice of the demon man is: Ikemizu Michihiro.

Demon man (the character in the cartoon Dragon Ball) generally refers to Hellscream (the character in Toriyama Akira's Dragon Ball).

Hellscream is a character in the popular Japanese anime Dragon Ball, which comes from hell. Because of its powerful fighting power and the evil light that can make others' evil hearts swell, it has always been the strongest among the five warriors of divination mother-in-law. But because of a special situation-the arrival of Goku's grandfather Sun Wufan, he had to become the fourth soldier.