Police (ポリス,Porisu) is Koichi Hirose's sleepy dog. In almost all of his appearances he is seen sleeping. Koichi once even wondered if he was still alive.
As the Hirose family already has Police, Koichi isn't allowed to have another pet and has to take him for walks. He is seen sleeping at the beginning of Tamami Kobayashi's and Yukako Yamagishi's fights and is taken for a walk during Yuya's fight.
Junko (順子) is a girl Toshikazu had a crush on. She is in class 3-E of Budogaoka Highschool. He made Surface copy her but it also adopted her personality, acting like "a real bitch" and thinking "she's all that". Toshikazu wanted to force himself on her, but never had the courage to actually do it.
Masaji (マサジ) is a drunk fisherman who, along with his grandfather, saw Yukako fall from Boing-Boing Cape and Koichi save her with Echoes ACT2. Assuming she was a girl who tried to commit suicide by jumping off the cliff and miraculously bounced back up, Masaji started a rumor that there was a god of the sea in the cape. The rumor spread and the fishermen started to pray for good luck to the rock Yukako was going to fall on, calling it a "sacred spot". This story turned Boing-Boing Cape into a point of interest for Morioh.
Sachiko (サチコ) is a fictional character from a TV show Josuke hated. For some unknown reason, she was going to leave her lover and wished to never see him again. Josuke tried to turn the TV off, but couldn't due to Red Hot Chili Pepper's electric intervention. Using the power cables, the Stand traveled to Josuke's house to threaten him because Jotaro didn't leave Morioh. Its possible Sachiko and her lover were going to kiss each other before Red Hot Chili Pepper's appearance, as they were slowly approaching each other before the show's broadcast was interrupted.
Lady Murakami (村上) is an old woman introduced in the manga as a passerby asking Rohan Kishibe and Koichi Hirose for directions to the Yamakura house because it's not shown on the map. Rohan tells her to give up because it probably doesn't exist if it's not on the map and she complains about Rohan's rudeness. In the first episode of the Diamond is Unbreakable anime adaptation, she is introduced and given a name, and is subjected to the gas of a car exhaust of a man who had been trying to seduce Tomoko Higashikata.
Ghost Alley's Residents
Several houses can be seen in the Ghost Girl's Alley: Yonemori (米森), Honma (本間), Onodera (小野寺), Numakura (沼倉), and a doghouse with the name Rocky (ロッキー,Rokkī). It is likely to be the same dog seen in Deadman's Questions.
The Yamakura (山倉) residence sought by Lady Murakami may also be in the ghost alley since it is not on Morioh's map.
The parents of Reimi Sugimoto. Reimi heard a dripping sound coming from their room and called for them but heard no response. The drip sound continued, and Reimi wondered why her parents hadn't heard it yet. She decided to go investigate the sound and found that Arnold was hanging on the coat rack, with his blood dripping. Yoshikage Kira then suddenly appeared and informed her that he had already taken care of her parents.
Reimi's parents are only named and aged in the film. Takashi, the father of the family, was 45 years old when he died. Kazuko, the mother, was 39 years old.
Ichiro Morishita (森下 一郎,Morishita Ichirō) is a man who bought 10 lottery tickets, but threw all of them in the trash after seeing that not even one was the winning one. Harvest found one of his tickets and gave it to Okuyasu, who discovered it actually was the winning one. A bank employer called him to see if the ticket really belonged to Okuyasu, but Crazy Diamond changed his last name in the ticket to Kinoshita. When asked about the ticket, Ichiro tells the bank employer that he isn't Kinoshita, but Morishita, and asks the bank employer to sell him winning tickets next time.
Yoshioka (吉岡) is a businessman who is seen talking to his boss on his cellphone. He is instructed to "do as planned" when receiving an important call 1 minute later. The call would grant a business opportunity worth one billion yen. If he missed the call, Yoshioka would be fired by his boss.
Seemingly nervous, Yoshioka agrees but his phone is stolen by Josuke immediately. Unaware of what just happened, he continues talking to his hand before he notices his phone is gone, and is then anguished over the loss of one billion yen and his job. As Josuke grabbed the phone too hard, it ended up breaking.
Akira is a man seen talking to his girlfriend, Minayo, on his cell phone. He is unnamed in the manga, but his girlfriend calls him Akira in the anime. Akira is nervous when trying to propose to his girlfriend, but she misunderstands and thinks he hates her. As he is about to propose, he has his phone stolen by Josuke before he could do so. He is in despair that his happy marriage will never happen now.
Minayo (美奈代) is a woman who is not seen, but is heard on the cellphone while talking to her boyfriend Akira. For unknown reasons she thinks he hated her, so Minayo insists for him to hang up the phone. Her boyfriend was actually trying to propose to her, but has his phone stolen by Josuke before he could do so. She wonders what he was going to say but Josuke hangs up and uses the phone to ask Koichi to locate Yuya Fungami.
Reiko (レイコ), Yoshie (ヨシエ), and Akemi (アケミ) are Yuya's fangirls. They all have a bokken with them and a "HIGHWAY STAR" tattoo on one of their arms. The three protected Yuya while he was hospitalized, not letting anyone come closer. They seemed to have a crush on him, but will argue with each other, such as fighting over helping him to pee. When Josuke encountered Yuya they attacked him.
With his heightened smell, Yuya could tell that the peach Akemi was going to give him was rotten and that Yoshie was on her period. He also thought that Reiko was mad at him because of the adrenaline he smelled, but the smell was from Josuke. When Josuke asks Yuya to help him find Koichi, Yuya smelled that the three girls were coming from the arcade with chocolates for Yuya won by Akemi. They threaten to attack Josuke, but Yuya tells them they are on good terms now. In the battle against Terunosuke, Yuya is inspired by Josuke's attempt to save Koichi, putting his own life in danger, and realizes he would do the same for his three fangirls.
Kimura is a boy Kira sees who is late for school. One of his friends tells him to not forget his hat because it's part of the uniform. From this, Kira comes to the conclusion that Hayato has not gone to school and is instead spying on him, as the hat was still hanging by the door.
Satoru Nakae (中江 悟) was Minako's boyfriend, and only named in the anime. He was 22 years old and a third-year student at T University. Thinking Kira was stealing his girlfriend's bag, Satoru yells at Kira. He confronts Kira again when they bump into each other and mocks him for his "lame" nail clippers. Kira stalks the couple to Satoru's apartment and blows him up instantly with Killer Queen, after Satoru promised to buy Minako a new pair of earrings. Kira then takes Satoru's ears and hung them on Minako's, telling her that her boyfriend left some earrings behind for her.
Mika was a friend Minako Okura mentioned to have gained a pair of diamond earrings as a gift from her boyfriend. Minako asks Satoru to buy her earrings as well, something that was overheard by Kira. He later forces Minako to wear her dead boyfriend's earrings before killing her, as a reminder of her wish of getting earrings like Mika.
Kai Harada (カイ原田) is the anchorman of Morioh Town Radio. He usually has a relaxing voice and calm attitude when addressing his listeners. A majority of his radio segments foreshadow or reference future Stand users.
Sakai (堺) is a friend of Toshikazu Hazamada. According to Tamami Kobayashi, the two got into an argument when Sakai insulted Hazamada's favorite idol or anime. That night, Sakai was listening to the "Help Me, Midnight Discussions!" segment on Morioh Town Radio and suddenly gouged out his left eye with a mechanical pencil due to Surface and was later taken to the hospital.
Rika is a 20 year old college student from downtown that works as a waitress at Cafe Deux Magots in S City. Her blood type is B and her zodiac sign is Virgo. Her favorite foods are miso-pickled ox tongue and nata de coco and she hates milk tea. She is secretly annoyed with her little toes that seem to be 0.5cm longer than other people. As for her personality she seems like a really nice person, acting caring and dedicated to her customers.
Okuyasu had an unrequited love with her but wasn't able to tell her due to being too afraid. She actually seems to have feelings for Rohan, as she starts smiling and singing when he's close.
Yamashita is a man who was murdered by Anjuro Katagiri in his own home with his wife tied up beside him. Anjuro murdered him by stabbing him in the neck with a fork and flees the apartment when Ryohei Higashikata and the police break into the room.
Masaya Yoshizawa is a young adult who harasses two girls walking by him along with his friend Hirata, trying to get the girls to come over to his place. After they walk away, he litters by throwing away his can on the ground as it missed the garbage can. Ryohei shows up to lecture him, leading Masaya to pick up his trash and discard it normally. Ryohei mentions how he heard Masaya quit his job and tells the boy to call him if he ever needs anything, as it's his duty to show people the right path. Masaya reassures Ryohei that he won't make trouble for him again.
Later, he and Hirata are by a fountain when Aqua Necklace attacks Hirata by entering his mouth and rupturing his internal organs. Aqua Necklace then enters Masaya's body and takes control of him, causing him to become a robber of a convenience store. He takes a woman hostage but Josuke punches a hole through the both of them with Crazy Diamond. The two are both immediately healed, but Crazy Diamond also infused Masaya's knife into his stomach. Aqua Necklace exits his body as Anjuro has no use for him anymore.