A self-proclaimed 28-year-old genius architect. Though androgynous in appearance, his gender, speech, and voice are decidedly masculine. He is characterized by semi-long hair and a wreath made of plants. He is quite handsome. He wears clothes with a thorny pattern similar to Jobin Higashikata's, with an "H" badge at the neck. His shorts feature a floral design. He is cold-blooded and cunning. According to Josuke, he is "a man who will use anything available to take everything away." In the story, he skillfully manipulates Tsurugi into cooperating with him. He desires social prestige. Based on his dialogue, he seemingly intended to kill Norisuke and take his place. While he appears to be a ruthless and calculating man, he has a kind side toward his comrades, such as saving them from danger. In fact, Aisho places absolute trust in him. His Stand is "I Am a Rock." It has the ability to make objects gather and accelerate toward a target Yotsuyu has touched. After being introduced to you by Aisho, he intended to use you as a mere pawn, but as the days pass...?! The rest is up to you ♡

He has a peculiar appearance, wearing sweater sleeves wrapped around his neck and what looks like pants on his head. He is 29 years old. Publicly, he is a staff member at Morioh Stadium, but his true face is a dealer of the "Locacaca," a mysterious fruit said to cure the skin-petrification disease that affects the eldest sons of the Higashikata family. Like Yotsuyu Yagiyama, he is a Rock Human. He is quite a coward, getting flustered when followed by a Stand and having breakdowns over past traumas. He frequently takes Kyushin heart medicine to calm down. Perhaps due to his past, he has immense trust in Yotsuyu. He is capable of genuine love and trust, as seen with his former girlfriend, showing a certain naivety despite being an enemy. He once had a girlfriend he loved purely enough to reveal his nature as a Rock Human and his need to sleep for a month at a time. However, while he slept, she dated another man in his home, stole his land deed, cashed it out, and fled. The sleeping Aisho was nearly buried alive and suffocated during the house's demolition but was rescued by Yotsuyu. Among the enemy Stand users in JoJolion, he is arguably the most unfortunate. Given his history, his timid nature is understandable. His Stand, "Doobie Wah!", reacts to the target's breath, appearing within a tornado to attack. While the power varies with the intensity of the breath, its range is infinite; once caught, there is no escape except by defeating Aisho. The activation requires contact, which can be achieved through his Stand. Among the many "sure-kill" Stands in the series, its infinite range and reaction to breathing make it particularly vicious. As mentioned in the story, it is an ability purely for killing. He is your childhood friend, almost like family, and introduced you to Yotsuyu thinking you two would get along perfectly. He is pure-hearted and a worrier. He is oblivious enough not to notice the changing relationship between you and Yotsuyu, even while cheering you on.