|Occupation||Middle School Student|
|First Apperance||Chapter 3|
"Fear? No way. It's the afterglow. I just got flooded by the most wonderful feeling of ecstasy in my life... Ataru Kashiwagi...... I despite you...! Still... you are the first opponent to give me this climax! Aah! I hate you! I loved it! I hate you! But I loved it! I'm begging you, don't let anyone beside me kill you... Ataru Kashiwagi!!"
– Aiji Hoshina when answering Marble's question, Chapter 10
Aiji Hoshina (星名 アイジ, Hoshina Aiji) is one of the antagonists in first and third part of the story. He become Ataru Kashiwagi's follower sometimes during the second part of the story.
Aiji like to takes pleasure in "madness." He appears cute and innocent at the beginning, but purposely killed the judges in the game for his very own enjoyment.
Chapter 1-10 (First Season)Edit
Aiji first appeared in chapter 3 during the "No Answer" game, after being called, he shows his bib with a cross on it even if, according to his appearance, a cross wouldn't have fit him. Since the rules didn't say that showing the bib was forbidden, Marble doesn't punish him. One of the judges votes for cross, however the majority votes for circle, meaning Aiji's prediction was wrong. The judge who voted for cross lied, so all judges were beheaded. Marble decided to save him.In chapter 6, for the third game he is "assigned" to a group which includes Ataru Kashiwagi, Koyori Kanda and Ruriri Ichijou too. he intentionally shows his 3 "faulty" tweets, which are about a book having been stolen and sold by him. Although he seems to loose follower for that tweet, Ataru protects him showing a tweet in which he says he had saved a stray cat, reaffirming one can not evaluate someone's life with only one negative fact. Then, Aiji revealed someone's faulty tweet in public and he tells the kid to unfollow his mother, which caused both mother and son are die together. Not too soon, Aiji revealed Ataru's faulty tweet that he "killed" someone. After listening Ataru's dark past, Aiji noticed Ataru don't wanted his sister to be sad is just a lying. After Yuri re-follow Ataru once again, Aiji is disappointed at Ataru didn't suicide for Yuri unfollow him. Aiji continue to challenging Ataru and his friends in the whole game afterward. Brfore Yuriko found Aiji's hidden tweet, Aiji just founded out Yuriko's hidden tweet thanks to his followers and caused Yuriko is killed. After Yuriko's death, he saw Ataru's face look like he want to take revenge for Yuriko so he requested Marble to continue the game and both Ataru and Marble accept it. During the game, Aiji keep said Ataru is a useless coward but because of this, Ataru able to founded out his hidden tweet and lose to Ataru. Aiji thought he is about to die but he didn't due to Ataru didn't actually hit the gong. Aiji said Ataru is a coward because he didn't kill him but Ataru replies that he will try his best to not kill anyone. When Marble tells Aiji wake up and said he is scared, Aiji replies he did not scared but he is in "afterglow" due to he get to feel this "wonderful feelings" from Ataru, he also hopes Ataru to not be killed by anyone beside Aiji himself.
Chapter 11-70 (Second Season)Edit
After the Dark History Trials game, Aiji joined Ataru's group and become friends.
Aiji appeared in Chapter 68, to shows celebrating their victory and the end of the SNS Hide-and-Seek.
Chapter 71- (Third Season)Edit
Aiji is choose as one of the 30 players to be play at Real Account Tower.During Real Account GO game, Aiji saw Ayame Kamijou around. Aiji let his smartphone battery in a very low battery life and used one of his pocket monster to exchange both he and Ayame's battery life. After the battery life exchange is done, Aiji used Ayame's smartphone to call Yuuma Mukai to crystal area to challenge him. After Yuuma came to the area, Aiji challenge him and see which Yuuma will choose whatever to save Ayame or his own battery life, Aiji is also exist to see what face Yuuma will do if he is nearly dead. After Ayame is "death", Yuuma used one of his pocket monster to exchange both he and Aiji's battery life, which scared Aiji so much due to how low battery life remain now. The challenge result is ended with Yuuma win. Before Aiji is about to dead, Sayaka Shiiba saved his life by using one of her pocket monster and shared their battery life together. Sayaka tells Aiji stop fooling around and he replies he isn't fooling around, but enjoying and feel great on how Yuuma did to him. Then, Sayaka revealed that she hiding in the cave all the time and Yuuma noticed her around, which she replies it's the reason why he didn't kill Aiji. Aiji is disappoint after hearing this, he said Yuuma isn't much "manlier" as his twin brother did, who did the "most evil thing ever in this world".
During 24 Hours Unscrupulous Hunting Campaign game, Aiji is tagged with Hako. After Yuuma defeated Zui Zakuro, along with Hako was stealing everyone's points and it's revealed Aiji can also joins Hako's new world too. After the fourth game is finished, along with other players was celebrating their victory on the game. After Ataru showed in front of Yuuma, Aiji going to gives Ataru a kiss which make Sayaka so jealous at him and she also want to gives Ataru a kisses too. Ataru revealed that Aiji is one of his panther during half years ago, he also revealed there's one more panther in his groups, Koyori. Both Aiji and Sayaka shows a sad face after heard Koyori's name.One day after the fourth game finished, the fifth game is started with every players wears school uniforms. After Kanata Hidzuki's death, Ayame requested Aiji and Mizuki Kurashina works together to finds the true identity of Chairman Marble, in order to save Yuuma from mistakenly for being Chairman Marble. Both Aiji and Mizuki don't want to work together due to Aiji think Mizuki is just some crazy murderer who showed to have a "boys love" interests, and he doesn't want to help Ataru's enemies. Ayame stopped both of them and tells them must works together. Aiji and Mizuki agreed with Ayame and they started their mission to finds the Chairman Marble. Both Aiji and Muzuki returns to the class and starts doing their "job", injuring the players in order to find who is the Chairman Marble.
After the third voting result showed up and revealed that Karin Koma isn't the Chairman Marble, Sayaka telling Aiji must to heals his injures but he said that he can't move anymore. Soon, Sayaka bring Aiji to the Health Room to heals his injures. After Aiji and the others was healed, Aiji keep cover his face. Mizuki asking Aiji why is he covering his face, he replies he is disappoint that the "Berserker" Yuuma was only appeared for less than a minutes and everything he does previously together with Mizuki and Ayame was completely pointless. When Yuuma asking about the information they receive so far, Aiji leave the Heart Room since Yuuma didn't gone mad that makes him feel boring. Soon, along with the other 17 players were voting their own name under Yuuma's order.
Later during False Information Island game, Aiji works together with Yuuma. Aiji state that he hope Yuuma can gives him a lot of great "pleasure", but Yuuma deny it as he's not interesting at such thing. Soon both Aiji and Yuuma received a tweet from Yasuharu Tanaka that he and Isuke Benimoto found some information which may able to get a treasure at a beach location. After Yuuma realized that the information was fake, he tried to stop the others to find the treasure but it's too late, which caused Yasaharu and Isuke was killed in the spike trap. Aiji, at first was almost killed into the spike trap, but Yuuma saved him from being killed.
- ↑ Real Account II Chapter 139