Rohan Kishibe  

, 岸辺 露伴

Rohan is a renowned mangaka who initially presents himself as an adversary to Koichi and Toshizaku when they visit his home seeking an autograph. Later, he employs his stand "Heavens Door" to hinder their attempts to view the latest issue of his manga. Subsequently, he peruses their memories through "Heavens Door," discovering information about Josuke, Okuyasu, and other characters in the story based solely on Koichi's perspective. As a result, Rohan decides to utilize them as inspiration for his manga. Following this, Koichi serves as Rohan's personal motivation. Eventually, Okuyasu and Josuke track down Rohan and defeat him, leaving him hospitalized for some time.